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Ngân hàng câu hỏi kiểm tra, thi đầu vào các công ty, nhà máy hóa học Q1) Which point defect in crystal does not alter the density of the relevant solid? Q1) Which point defect in crystal alter the density of solid? Q1) Which point defect in crystal increases the density of solid?
Question Bank Based on Board Papers Prepared By Mrs S.Srivastava (The Solid States) marks SAMPLE PAPER- (OLD) Q9) Equal no of cation & anion missing in the diagram is given (i) What are these types of vacancy defects called? (ii) How is the density of crystal affected by these defects? (iii) Name one ionic compound which can show this type of defect in crystalline state (iv) How is the stoichiometry of compound affected? Q10) Analysis shows that M.O has E.F.M 0.96 O 1.00 Calculate % M 2+ & M 3+ ions in the crystal Q10) In an ionic compound N- form cubic close type packing while the cation M+ ions occupy one third of the tetrahedral voids Deduce the formula of compound & the C.N of M+ ions SAMPLE PAPER- (OLD) Q5) A compound contains types of atoms X & Y It crystallizes in a cubic lattice with atom X at the corner & Y at body centres What is the simplest possible formula of compound Q19) An element X with an at.mass 60 g/mol has density 6.23 g/cm3 If the edge length of cubic unit cell is 400pm.Identify the type of cubic unit cell Calculate the radius of an atom of this element SAMPLE PAPER- (OLD) Q1) Name the type of point defect that occurs in a crystal of ZnS Q4) How many octahedral voids are there in one mole of a compound having cubic close packed Structure? Q9) An element crystallizes in BCC structure.If the edge length of the cell is 1.469 x 10 -10 m & density is 19.3 g/cm3 Calculate the at Mass of this element Also calculate the radius of an atom of this element 2008 D Q1)What is the C.N of each type of ions in a rock salt type crystal structure? Q19) what is a semiconductor? Describe the two main types of semiconductors & explain mechanism for their conduction Q1) What is the total no of atoms per unit cell in a FCC structure? Q1) What is the total no of atoms per unit cell in a FCC structure? Q1) What type of substance exhibits antiferromagnetism? Q19) Reasons: (i) Frenkel defects are not found in alkali metal halides (ii)Schottky defects lower the density of related solids (iii) Impurity doped Si is a semiconductor Q19) Explain (i) Ferromagnetism (ii)Paramagnetism (iii) Ferrimagnetism 2008 AI Q1) What is the total no of atoms per unit cell in a FCC structure? Q19) Ag crystallizes in FCC lattice The edge length of its unit cell is 4.077 x 10 -8 cm & its density is 10.5 g/cm3 Calculate the at Mass of Ag 2008 F Q1) What type of alignment in crystals make them ferromagnetic Q19) Reasons: (i) Frenkel defects are not found in alkali metal halides (ii)Schottky defects lower the density of related solids (iii) Impurity doped Si is a semiconductor Q19) Explain (i) F-centre (ii)Paramagnetism (iii) Frenkel defect 2008 D COMPTT Q1) Name an element with which Si should be doped to give n- type semiconductor Q19) Explain (i) F-centre (ii) Schottky defect (iii) Ferromagnetism 2008 AI COMPTT Q1) What are F- centres? Q19)Reason: (i) Fe3O4 is ferromagnetic at room temperature but becomes paramagnetic at 850K (ii) ZnO on heating becomes yellow (iii) Frenkel defect does not change the density of AgCl crystals Q19) With the help of suitable diagram, on the basis of Band theory,explain the difference between (a)A conductor & an insulator (b) A conductor & semiconductor Q8) Why is glass considered a supercooled liquid Q4) What is the two dimensional coordination no of a sphere in square close packing? 2009 AI Q1) How metallic & ionic substance differ in conducting electricity? Q20) Ag crystallizes with FCC unit cells Each side of the unit cell has a length of 409 pm what is the radius of an atom of Ag? Q1) Which point defect of its crystals decreases the density of a solid? Q19) Fe has a BCC unit cell with a cell edge of 286.65 pm The density of Fe is 7.87 g/cm3 Calculate Avogadro’s no (at Mass Fe=56 g/mol) Q1) What is the total no of atoms per unit cell in a FCC structure? 2009 D Q1) Which point defect in crystal does not alter the density of the relevant solid? Q1) Which point defect in crystal alter the density of solid? Q1) Which point defect in crystal increases the density of solid? 2009 F Q1) What is the no of atoms in a BCC unit cell of a crystal 2009 D COMPTT Q13) How are the following properties of crystals affected by Schottky & Frenkel defects?(i) density (ii) electrical conductivity Q13) (a) In reference to crystal structure, explain the meaning of C.N.(b) What is the no of atoms in a unit cell of FCC & BCC structure Q14) Cu crystallizes into a FCC lattice with edge length 3.61 x 10 -8 cm Calculate the density of Cu? (Cu = 63.5 g/mol) 2010 AI Q1) What type of interaction hold the molecules together in a polar molecular solid? Q19 ) The density of Cu metal is 8.95 g / cm3 If the radius of Cu atom be 127.8pm Is the unit cell simple cubic , BCC or FCC? ( Cu = 63.54 g /mol , NA = 6.02 x 10 23 mol-1) Q1) What type of semiconductor is obtained when Si is doped with As? Q19) Ag crystallizes in FCC cubic unit cell Each side of the unit cell has a length of 409 pm What is the radius of Ag atom Q1)Write distinguishing feature of metallic solids Q19) Ag crystallizes in FCC cubic unit cell If the edge length of unit cell is 4.07 x 10-8 cm and density 10.5 g/cm3 Calculate the atomic mass of Ag (NA = 6.02 x 10 23 mol-1) 2010 D Q1)Write distinguishing feature of metallic solids from an ionic solid Q19)In one unit cell of CaF2 there are 4Ca2+ and F- ions.Ca2+ are arranged in FCC lattice.The F- ions fill all tetrahedral holes in the FCC lattice of Ca2+ ions,The edge of the unit cell is 5.46 x 10 -8 cm in length,the density of solid is 3.18 g/cm3.Calculate Avogadro’s no (M.M of CaF2 =78.08 g/mol) Q1) Which point defect in crystal of solid does not change the density of solid Q1) Which point defect in crystal of solid decreases the density of solid 2010 F Q1) What is the no of atoms in a unit cell of a simple cubic crystal? Q19) Fe has a BCC unit cell with a cell edge of 286.65 pm The density of Fe is 7.87 g/cm3 Calculate Avogadro’s no (at Mass Fe=56 g/mol) NEW SAMPLE PAPER I Q1) Why LiCl acquires pink colour when heated in Li vapours Q17) Sodium crystallizes in BCC unit cell Calculate the approximate no of unit cells in 9.2 g of sodium (Na = 23) Q18) What is a semiconductor? Describe the two main types of semiconductors NEW SAMPLE PAPER II Q10) KF has CCP structure Calculate the radius of unit cell if the side of the cube or edge length is 400 pm.How many F- ions and octahedral voids are there in this unit cell Q11) Give reasons: (a) Why is Frenkel defect found in AgCl? (b) What is the difference between P doped and Ga doped semiconductors NEW SAMPLE PAPER III Q9) Au )at.mass 197 u , at, radius= 0.144 nm) crystallizes in a FCC unit cell Determine the density of Au.(NA = 6.022 x 10 23 mol -1) Q10) Classify each as being either p-type or n-type semiconductor Give reason (a)Si doped with In (b) Si doped with P 2011 AI Q9) Explain how you can determine the at.mass of an unknown metal if you know its mass, density and the dimensions of unit cell of its crystal Q10) Calculate the packing efficiency of a metal crystal for a simple cubic lattice Q9)Define the following terms in relation to crystalline solids (a) Unit cell (b) co-ordination no Give one example in each case 2011 D Q1) Crystalline solids are anisotropic in nature What does this statement mean? Q19) Ag crystallizes in FCC unit cell Each side of this unit cell has a length of 400pm Calculate the radius of Ag atom Q1) Which stoichiometric defect in crystal increases density of solid? Q19) The density of lead is 11.35 g/cm3 and the metal crystallizes with FCC unit cell Estimate the radius of lead atom (Pb = 207 g/mol) 2011 F Q1) What is meant by an intrinsic semi conductors? Q19) Al crystallizes in CCP Radius of atom in metal is 125 pm (a) What is the length of side of unit cell? (b) How many unit cells are there in 1cm3 of Al Q1) How many atoms are there in one unit cell of BCC crystal? Q19) Ag crystallizes in FCC unit cell Each side of this unit cell has a length of 409 pm Calculate the radius of Ag atom 2010 D COMPTT Q13) How are the following properties of crystals affected by Schottky and Frenkel defects (i) density (ii) Electrical conductivity Q13) (a) In reference to crystal structure , explain the meaning of coordination number (b ) What is the number of atoms in a unit cell of (i) a FCC structure (ii) a BCC structure Q14) Copper crystallizes into an FCC lattice with edge length 3.61 x 10 -8 cm Calculate the density of copper (Cu= 63.5 g/mol ,NA = 6.022 x 1023 /mol) 2010 AI COMPTT Q1) Give an example of an ionic compound which shows Frenkel defect Q19) Copper crystallizes into an FCC lattice and has a density of 8.930g/cm3 at 293 K Calculate the radius of copper atom (Cu= 63.5 g/mol , NA = 6.022 x 1023 /mol) 2012 AI Q1) how may the conductivity of an intrinsic semiconductor be increased? Q19) copper crystallizes with FCC unit cell if the radius of Cu atom is 127.8 pm, calculate the density of Cu metal (at.mass of Cu = 63.55 u and NA = 6.02 x 10 23 /mol) Q19)iron has BCC unit cell with cell dimension of 286.65 pm Density of iron is 7.87 g/cm3.use this information to calculate Avogadro’s number (at.mass of Fe = 56.0u) Q1) which stoichiometric defect increases the density of a solid? Q1) what are n-type semiconductors? 2012 D Q1) What is meant by doping? Q19) Tungsten crystallizes in body centred cubic unit cell.If the edge of the unit cell is 316.5 pm.What is the radius of tungsten atom? Q19) Iron has a body centred cubic unit cell with a cell dimension of 286.65 pm The density of iron is 7.874 g/cm3 Use this information to Calculate Avogadro’s number.(at Mass of Fe = 55.845 u) Q1)Write a point of differences between a metallic solid and an ionic solid other than metallic luster 2012F Q1)What is meant by the term ‘forbidden zone’ in reference to band theory of solids? Q19) Iron has a body centred cubic unit cell with a cell dimension of 286.65 pm The density of iron is 7.874 g/cm3 Use this information to Calculate Avogadro’s number.(at Mass of Fe = 55.845 u) Q19) Silver crystallizes in FCC unit cell.If the radius of silver atom is 145 pm, what is the length of each side of unit cell? Q1)Write a point of differences between a metallic solid and an ionic solid other than metallic luster Q1) Define paramagnetism with an example 2013 AI Q9) account for the following: (i) schottky defects lower the density related solids (ii) Conductivity of silicon increases on doping it with phosphorus Q10) aluminium crystallizes in a fcc structure atomic radius of the metal is 125 pm What is the length of the side of the unit cell of the metal? Q9) (a) why does presence of excess of lithium makes LiCl crystals pink? (b ) a solid with cubic crystal is made of two elements P and Q atoms of Q are at the corners of the cube and P at the body centre what is the formula of the compound Q13) (a) what change occurswhen AgCl is doped with CdCl2? ( b ) what type of semiconductor is produced when silicn is doped with boron Solid state FORMULAE : LIMITING RADIUS RATIO r+/ rFOR CsCl STRUCTURE r+ (CATION RADII) =0.732 (C.N.8) r- (ANION RADII) FOR NaCl STRUCTURE r+ (CATION RADII) =0.414-0.732 (C.N.6) r- (ANION RADII) FOR ZnS STRUCTURE r+ (CATION RADII) =0.225 – 0.414 (C.N.4) r- (ANION RADII) FORMULA OF ACOMPOUND: NO OF OCTAHEDRAL VOID=N NO OF TETRAHEDRAL VOID = 2N RELATIONSHIP BETWEEN RADIUS OF THE SPHERE AND UNIT CELL EDGE LENGTH SIMPLE a =2r F.C.C a = / √2 r B.C.C a = /√3 r DENSITY OF THE UNIT CELL d = z M / a3 NA = no of atoms per unit cell x molar mass (cell edge length)3 x Avogadro’s No Imp Points to be noted: AS DENSITY OF ELEMENT IS GIVEN IN g/cm , THE EDGE LENGTH IS TO BE CHANGED IN cm IF VALUE OF a IS GIVEN IN pm THEN IT SHOULD BE MULTIPLIED BY10 -30 FOR NaCl STRUCTURE CELL LENGTH = X DISTANCE BETWEEN Na + AND Cl- ION IN SOME NUMERICALS d = wt OF ELEMENT X NO OF ATOMS PER UNIT CELL (CELL EDGELENGTH) X NO OF ATOMS PRESENT IN ELEMENT M IS AT MASS IN CASE OF ELEMENTS AND MOLAR MASS IN CASE OF IONIC MOLECULE LIKE NaCl VALUE OF z SIMPLE CUBE = B.C.C = F.C.C = CsCl = , NaCl = ,ZnS = Question Bank (Solutions) marks SAMPLE PAPER- (OLD) Q11) Diagram of R.O given (i)Name the process occurring in the above plant (ii) To which container does the net flow of solvent take place? (iii) Name one SPM which can be used in this plant (i) Give the practical use of the plant Q19) Heptane & Octane form an ideal solution at 373 K The V.P of the pure liquid at this temperature is 105.2 KPa & 46.8 KPa resp if the solution contains 25g of heptanes & 28.5 g of octane Calculate (i) V.P exerted by heptanes (ii) V.P exerted by solution (iii)mole fraction of octane in theV.P SAMPLE PAPER- (OLD) Q6) What is van’t Hoff factor for a compound which undergoes tetramerization in an organic compound ? Q9)Ethylene glycol (M.M = 62 g/mol) is an antifreeze Calculate F.P of solution containing 12.4 g of substance in 100 g of water Would it be advisable to keep the substance in the car radiator during summer (kf for water = 1.86 KKg/mol , Kb for water= 0.512 KKg/mol) Q18) Reason: (a) At higher altitude people suffer from a disease called anoxia In this disease they become weak & can’t think clearly (b) When HgI2 is added to KI , the F.P is raised? SAMPLE PAPER- (OLD) Q28) (a) Derive relationship between relative lowering of V.P & mole fraction of the volatile liquid (b) (i) Benzoic acid completely dimerises in benzene What will be the V.P of a solution containing 61 g of benzoic acid per 500 g benzene when the V.P of pure benzene at the temp of experiment is 66.6 Torr (ii) What would have been the V.P in the absence of dimerization (iii) Derive a relationship between mole fraction & V.P of a component of an ideal solution in the liquid phase & vapour phase Q28) (a) Which aqueous solution has higher concentration 1M or molal solution of the same mole? Give reason (b) 0.5 g KCl was dissolved in 100 g water & the solution originally at 20 0C, froze at -0.24 0C Calculate % ionization of salt (Kf= 1.86 KKg /mol) 2008 D Q11) State Henry’s law correlating the pressure of a gas & its solubility in a solvent & mention two applications for the law Q20) Calculate the temp at which a solution containing 54 g of glucose (C6H12O6) in 250 g of water will freeze (Kf for water =1.86 KKg/mol) Q9) State Raoult’s law for solution of volatile liquids taking suitable examples Explain the meaning of positive & negative deviations from Raoult’law Q9) Define the term O.P Describe how the mol.mass of a substance can be determined by a method based on measurement of O.P 2008 AI Q20) A solution containing g of substance in 100 g of diethyl ether boils at 36.86 0C whereas pure ether boils at 35.6 0C Determine the mol.mass of solute.( Kb for ether = 2.02 KKg/mol) Q20) Calculate the temperature at which a solution containing 54 g of glucose (C6H12O6) in 250 g of water will freeze.(Kf for water = 1.86 KKg/mol) 2008 F Q3) (a) State how the V.P, of a solvent is affected when a non volatile is dissolved in it ( b )A 5% solution ( by mass ) of cane sugar in water has a F.P 271K Calculate the F.P of 5% (by mass) solution of glucose in water (F.P of water is 273.15K,M.M.of sugar = 342g/mol & M.M of glucose = 180 g/mol) Q4) (a) If density of water of a lake is 1.25 g/mol & kg of lake water contains 92g of Na+ ions Calculate the molarity of Na+ ions in this lake water (b)Calculate the mass of a non volatile solute ( mol mass 40 g/mol) which should be dissolved in 114 g of octane to reduce its V.P to 80 % (M.M of octane = 114 g /mol ) 2008 D COMPTT Q28) (a) The depression of F.P of water observed for the same molar concn of acetic acid, trichloroacetic acid & triflouroacetic acid increases in the order as stated above Explain ( b )Calculate the depression in F.P of water when 20 g of CH3CH2CH(Cl) COOH is added to 500 g of water (Ka =1.4 x10-3, Kf= 1.86KKg /mol) Q28) (a) State Henry’s law & mention its two important applications (b) Henry’s law constant for CO dissolving in water is 1.67 x 10 Pa at 298 K Calculate the quantity of CO2 in 1L of soda water when packed under 2.5 atm CO pressure at 298 K 2008 AI COMPTT Q9) What is meant by negative deviation from Raoult’s law? Draw diagram to illustrate the relationship between V.P & mole fraction of components in a solution to represent negative deviation Q20) The b.p elevation of 0.3g of acetic acid in 100g benzene is 0.0633K Calculate the molar mass of acetic acid from this data.What conclusion can you draw about the molecular state of the solute in solution? (Kb for benzene = 2.53KKg/mol) Q18) Distinguish between the terms molality & molarity.Under what conditions are the molarity & molality of a solution nearly the same? Q26) The F.P of a solution containing 0.2 g of acetic acid in 20 g of benzene is lowered by 0.450 Calculate (i) the mol.mass of acetic acid from this data (ii) van’t Hoff factor (Kf benzene = 5.12 K Kg/mol) What conclusion can you draw from the value of van’t Hoff factor obtained Q13) What are non ideal solutions? Give one example.Explain as to why non ideal solution deviate from Raoult’s law Q21) Calculate the amount of KCl which must be added to 100 g of water so that water freezes at –20C Assume that KCl undergoes complete dissociation (Kf = 1.86KKg/mol , K=39,Cl=35.5) 2009 AI Q28) (a) Define (i) mole fraction (ii) van’t Hoff factor (b)100mg of a protein is dissolved in enough water to make 10 ml of a solution.If this solution has an O.P of 13.3 mm Hg at 25 0CWhat is the molar mass of protein? (R= 0.0821 Latm/mol/K & 760 mm Hg=1atm) Q28) (a) What is meant by (i) Colligative property (ii) molality of solution (b)What concentration of N2 should be present in a glass of water at room temp.?Assume temp of 250C , a total pressure of atm & mole fraction of N2 in air of 0.78 (KH for N2 = 8.42 x 10 –7 M/mmHg) 2009 D Q13) Differentiate between molality & molarity of solution.What is the effect of change in temp of a solution on its molality or molarity? Q19) Calculate F.P depression expected for 0.0711 m aq.solution of Na2SO4 If this solution actually freezes at –0.320C What would be the value of van’t Hoff factor (Kf for water = 1.86KKg/mol) 2009 F Q2) What is reverse osmosis? 2009 D COMPTT Q5) Define the term Osmotic Pressure Q6) State the main advantage of molality over molarity as the unit of Concentration Q27) Calculate the amount of NaCl which must be added to kg of water is depressed by 3K ( Kf = 1.86KKg/mol, Na=23,Cl=35.5) Q5) State Raoult’s law for solution of volatile liquid Q6) Define ideal solution Q19) A solution of urea in water has a b.p 373.128K Calculate the F.P of the same solution (Kf = 1.86Km-1 , Kb=0.52Km-1) Q23) 0.1 mole of acetic acid was dissolved in kg of benzene Depression in F.P of benzene was determined to be 0.256K What is the state of solution? (Kf for benzene = 5.12K/m) 2010 AI Q9) Define the term osmosis and osmotic pressure.What is the advantage of using O.P as compared to other colligative properties for the determination of molar masses of solute in solution Q20) What mass of NaCl ( M.M = 58.5 g/mol) must be dissolved in 65 g of water to lower the F.P by 7.5 0C ? The F.P depression constant Kf for water is 1.86 Kkg/mol Assume that van’t Hoff factor for NaCl is 1.87 Q20) What mass of ethylene glycol (M.M = 62 g/mol) must be added to 5.5 kg of water to lower the F.P of water from 0 C to – 10 0C ? (Kf for water = 1.86 Kkg/mol) Q20) 15 g of an unknown molecular substance was dissolved in 450 g of water The resulting solution freezes at – 0.340C What is the molar mass of substance? (Kf for water = 1.86 Kkg/mol) Q2) Differentiate between molarity and molality of a solution 2010 D Q9)Non ideal solution exhibits either +ve or –ve deviation from Raoult’s law.What are these deviations and why they are caused?Explain with one example of each Q20) A solution prepared by dissolving 1.25 g of oil of winter green in 99 g benzene has a b.p of 80.31 0C.Determine the molar mass of this compound ( b.p of pure benzene = 80.10 0C and Kb for benzene = 2.530C kg/mol.) Q20) A solution of glycerol(M.M = 92 g/mol) in water was prepared by dissolving some glycerol in 500 g of water.This solution has a b.p of 100.42 0C What mass of glycerol was dissolved to make the solution (Kb for water = 0.512 Kkg/mol) 2010 F All questions repeated NEW SAMPLE PAPER I Q28) (a)Menthol is a crystalline substance with peppermint taste A 6.2% solutionOf menthol in cyclohexane freezes at-1.950 C Determine the formula mass of menthol.The F.P and molal depression constant of cyclohexane are 6.5 0C and 20.2 K m-1 respectively, (b) State Henry’law and mention its two important applications ( c ) Which of the following has higher b.p and why? 0.1M NaCl or 0.1M glucose Q28)(a) Define azeotropes and explain briefly minimum boiling azeotrope by taking suitable example ( b ) The V.P of pure liquids A and B are 450 mm and 700 mm of Hg respectively at 350 K.Calculate the composition of liquid mixture if total V.P, is 600 mmHg.Also find th composition of the mixture in vapour phase NEW SAMPLE PAPER II Q13) State Raoult’s law for a solution containing volatile liquids.Explain with suitable example the concept of max boiling azeotrope Q24)On dissolving 19.5 g of CH2FCOOH in 500 g of water a depression of 0C in F.P of water is observed Calculate the van’t Hoff factor and dissociation constant of flouro acetic acid, Given Kf = 1.86Kkg/mol NEW SAMPLE PAPER III Q1) A and B liquids on mixing produce a warm solution Which type of deviation from Raoult’s law is there? Q11) Determine the molarity of an antifreeze solution containing 250 g water mixed with 222 g ethylene glycol The density of the solution is 1.07 g/ml Q12)An aqueous solution containing urea was found to haveb.p more than the normal b.p of water(313.13K)When the same solution was cooled it was found that its F.P, is les than the normal b.p of water(273.13K) Explain these observations 2011 AI Q11)State the following (a) Raoult’s law in its general formin reference to solutions (b) Henry’s law about partial pressure of a gas in a mixture Q19) A solution prepared by dissolving 8.95 mg of a gene fragment in 35 ml of Water has an O.P of 0.335 Torr at 25 V Assuming that the gene fragment is a non electrolyte,calculate its molar mass Q19)What mass of NaCl must be dissolved in 65 g of water to lower the F.P of water by7.5 0C?TheKf for water is1.86 0C/m Assume van’t Hoff factor for NaCl is1.87(M.M of NaCl is 1.87(M.M of NaCl=58.5 g) Q2)What is reverse osmosis? Q3)Differentiate between molarity and molality values for solution.What is the effect of change in temperature on molarity and molality values? 2011 D Q28) (a) Differentiate between molarity and molality for a solution How does a change in temperature influence their values (b ) Calculate F.P of aq solution containing 10.5 g of MgBr2 in 200g of water (MM of MgBr2 = 184g) (Kf for water = 1.86 Kkg/mol) Q28) (a) Define osmosis and osmotic pressure Is the O.P.of a solution a colligative property? Explain (b )Calculate the b.p of a solution prepared by adding 15 g of NaCl to 250 g of water.(Kf for water = 0.512 Kkg/mol , M.M of NaCl = 58.44g) Q28) (a) repeated (b ) What would be the M.M of a compound if 6.21 g of it dissolved in 24 g of chloroform a solution that has a b.p of 68.04 0C The b.p of pure chloroform is 61.7 0C ( Kb for chloroform = 3.63 0C/m) 2011 F Q2) State Henry’s law about partial pressure of a gas in a mixture Q9) Differentiate between molarity and molality for a solution Explain how molarity value of a solution can be converted into its molality Q10) A 0.561 m solution of an unknown electrolyte depresses the F.P of water by 2.93 0C What is van’t Hoff factor for this electrolyte (Kf = 1.86 0C/kg/mol) 2010 D COMPTT Q5) Define the term Osmotic Pressure Q6) State the main advantage of molality over molarity as the unit of concentration Q27) Calculate the amount of NaCl which must be added to one kg of water so that the F.P of water is depressed by 3K (Kf = 1.86 Kkg /mol,Na =23, Cl=35.5) Q4) State Raoult’s law for a solution of volatile liquids Q19) A solution of urea in water has a b.p of 373.128K.Calculate the F.P of the Same solution.(Kf for water = 1.86K/m , Kb = 0.52 K/m) Q1) Define an ideal solution Q23) 0.1 mole of acetic acid was dissolved in kg of benzene Depression in F.P of benzene was determined to be 0.256 K What conclusion can you draw about the state of the solute in solution (Kf for benzene = 5.12 K/m) 2010 AI COMPTT Q2) Define the term, mole fraction Q9) State Henry’s law and mention its two important applications Q10) Calculate the mass of ascorbic acid (C6H8O6) to be dissolved in 75 g of acetic acid to lower its melting point by 1.5 0C (Kf for acetic acid = 3.9 Kkg /mol) Q17) Find the b.p of a solution containing 0.520 g of glucose (C6H12O6) dissolved in 80.2 g of water.(Kb for water =0.52 K/m) Q18)Define the term Molarity of a solution State one disadvantage in using the molarity as the unit of concentration Q13) Find the f.p of a solution containing 0.520 g of glucose (C6H12O6) dissolved in 80.2 g of water.(Kf for water = 1.86 K/m) 2012 AI Q28) (a) define the following terms: (i) Mole fraction (ii) Ideal solution (b) 15 g of an unknown molecular material is dissolved in 450 g of water the resulting solution freezes at -0.34 C what is the molar mass of the material?(Kf for water = 1.86 Kkg /mol) Q28) (a) explain the following: (i) Henry’s law about dissolution of gases in a liquid (ii) Boiling point elevation constant for a solvent (b)a solution of glycerol (C3H8O3) in water was prepared by dissolving some glycerol in 500 g of water this solution has b.p.of 100.420C.what mass of glycerol was dissolved to make this solution? (Kb for water = 0.512 K kg /mol ) 2012D Q9)A molal aqueous solution of trichloroacetic acid is heated to its b.p The solution has the b.p of 100.18 0C.Determine the van’t Hoff factor for trichloroacetic acid.(Kb for water = 0.512Kkg/mol) Q20) Calculate the amount of KCl which must be added to 1kg of water so that the f.p is depressed by 2K.(Kf for water = 1.86Kkg/mol) Q20) a solution of glycerol (C3H8O3) in water was prepared by dissolving some glycerol in 500 g of water this solution has b.p.of 100.420C.what mass of glycerol was dissolved to make this solution? (Kb for water = 0.512 K kg /mol ) Q20) 15 g of an unknown molecular material is dissolved in 450 g of water the resulting solution freezes at -0.34 C what is the molar mass of the material?(Kf for water = 1.86 Kkg /mol) 2012 F Q9) (a) Define the following terms: (i) Van’t Hoff factor (ii) Mole fraction (iii) Ebullioscopic constant (b)State Raoult’s law 16) Gabriel phthalimide synthesis is preferred for synthesizing primary amines CONVERSION/WORD PROBLEM 1) How can you convert an amide into an amine having one C less than the starting compound? (a)Name the reaction (b)Give IUPAC name & structure of amine obtained by the above method if tha amide is 3chlorbutanamide 2) (i) Benzene diazonium chloride to nitro benzene (ii)aniline to Benzene diazonium chloride (iii)Ethylamide to methyl amine (iv)Aniline to nitro benzene (v)Ethanamine to N-ethyl ethanamide (vi)Chloroethane to propan-1-amin (vii) aniline to iodobenzene 3) Identify A and B (i) CH3CH2Cl (NaCN) → A (reduction Ni/H2) → B (ii) C6H5NH2 (NaNO2/HCl) → A (C6H5NH2 , OH-) → B 4)Aniline to sulphanilic acid 5)An organic compound (A) on treatment with NH3 followed by heating forms compound (B) which on heating with Br2 and KOH forms a compound (C) having M.F (C6H7N).Give the structures of A,B and C.and write the reactions involved COMPLETE EQUATIONS 1) Complete & name the reaction (i) RNH2 + CHCl3 + 3KOH → (ii) RCONH2+Br2+4NaOH → 2) (i) LiALH4/H2O RCONH2 → (iii) C6H5N2Cl + H3PO2 + H2O → (iv) C6H5NH2 + HNO2 → (v) C6H5N2Cl + CH3COCl → (vi) C2H5NH2 + C6H5SO2Cl → (vii)C2H5NH2 + HNO2 → (viii) C6H5NH2 + CHCl3 + 3KOH → 3)Identify A and B (i) CH3CH2Cl + NaCN A ( redNi/H2) B (ii)C6H5NH2 + NaNO2+HCl A ( C6H5NH2) OH- B QUESTION 1) Write the equation in which iodide ion replaces the diazonium gr in diazonium salt 2) (i) Arrange the following in an increasing order of basic strength in water C6H5NH2, (C2H5)2NH ,(C2H5)3N & NH3 (ii) Arrange the following in an increasing order of basic strength in gas Phase C2H5NH2, (C2H5)2NH ,(C2H5)3N & CH3NH2 3) Explain (i) Presence of base is needed in the ammonolysis of alkyl halide (ii) Aromatic primaryamines can not be prepared by GabrielPhthalimide synthesis 4)In the following rearrange (i) In an increasing order of basic strength C6H5NH2, C6H5N(CH3)2 ,(C2H5)2NH and CH3NH2 (ii)In a decreasing order of basic strength Aniline ,p-nitroaniline and p-toluidine (iii)In an increasing order of pKb values C2H5NH2 ,C6H5NHCH3,(C2H5)2NH and C6H5NH2 5) Rearrange in an increasing order of their basic strength C6H5NH2,C6H5N(CH3)2,(C6H5)2NH and CH3NH2 ) Arrange the following compounds in an increasing order of their solubility in water C6H5NH2,(C2H5)2NH and C2H5NH2 NAME REACTIONS (i) Hofmann Bromamide reaction (ii) Gabriel Phthalimide synthesis (iii) Carbylmine reaction (iv) Diazotization (v) Acetylation (vi) Coupling reaction of diazonium salt (vii) Gattermann reaction (viii) Ammonolysis of alkyl halide (ix) Write the name associated with the following reactions: (c) RCONH2+Br2+4NaOHRNH2+Na2CO3+2NaBr+2H2O (d) ArN2X- (CuCN/KCN)ArCN + N2 (e) RNH2+CHCl3+3KOH (heat)RNC+3KCl+3H2O (f) ArN2X- (Cu/HCl) ArCl+N2+CuCl DISTINGUISHING TEST (i) aniline & ethyl amine (ii) Dimethyl amine & Trimethylamine (iii) Methylamine & dimethylamine (iv) aniline & N-methylaniline (v) aniline & benzylamine (vi) aniline and N-ethyl aniline (vii) N-methyl propan-2-amine and N-ethyl-N-methyl ethanamine 2011 D Q7) Arrange the following compounds in an increasing order of their solubility in water C6H5NH2,(C2H5)2NH,C2H5NH2 Q26) (a) Explain why an alkyl amine is more basic than ammonia? (c) How would you convert (i) Aniline to nitro benzene (ii) Aniline to iodobenzene 2011 F Q7) Why is an alkyl amine more basic than ammonia Q25) Illustrate the following reactions giving a chemical equation in each case (i) Gabriel phthalimide synthesis (ii) A coupling reaction (iii) Hoffman bromamide reaction 2010 D COMPTT Q9) Reasons: (i) ethyl amine is soluble in water whereas aniline is insoluble (ii ) The pKb of aniline is higher than that of methyl amine (iii ) methyl amine reacts with FeCl3 solution to precipitate hydrated Fe2O3 (iv ) Aliphatic amines are stronger bases than aromatic amines Q10) Write the chemical reaction (i)Carbyl amine reaction (ii) Hoffman bromamide reaction Q17) Write the reaction (i) Coupling reaction (ii) Ammonolysis Q12) Write the reaction (i) Acetylation (ii) Gabriel phthalimide synthesis 2010 AI COMPTT Q15) Reasons: (i) The pKb of aniline is higher than that of methyl amine (ii)Aniline does not undergo Friedel Craft reaction (III) Gabriel phthalimide synthesis is preferred for synthesizing primary amines Q16) Distinguishing test: (I) Ethyl amine and aniline (II) Methyl amine and dimethyl amine Q26) (i) CH3CH2Cl ( NaCN) A (red.Ni/H2) B (ii ) benzene diazonium chloride +H3PO2 + H2O (iii ) RCONH2 (LAH/H2O) 2012 AI Q16) describe the following giving the relevant chemical equation in each case (i) Carbylamines reaction (ii) Hofmann’s bromamide reaction Q17) complete the following reaction equation: (i) C6H5N2Cl + H3PO2 + H2O (ii) C6H5 NH2 + Br2 (aq) 2012 D Q7 )Arrange the following in the decreasing order of their basic strength in aqueous solutions: CH3NH2,(CH3)2NH,(CH3)3N and NH3 Q26) Write chemical equations for the following conversions: (i) Nitrobezene to benzoic acid (ii) Benzyl chloride to 2- phenylethanamine (iii) Aniline to benzyl alcohol 2012 F Q16) Describe the following giving the chemical equation in each case: (i) Carbylamines reaction (ii) Hoffmann’s bromamide reaction Q17)Complete the following reactions equations: (i) C6H5N2Cl + H3PO2 + H2O (ii) C6H5NH2 + Br2(aq) 2013 AI Q6) Write the structure of n-methyl ethanamine Q24) Complete the following reactions: (i) CH3CH2NH2 + CHCl3 + alc.KOH (ii) C6H5N2 +Cl- (H2O Room Temp.) (iii) C6H5NH2 + HCl (aq) Q1)write the structure of 2-aminotoluene Q22) Complete the following reactions: (i) C6H5N2 +Cl- (H3PO2 + H2O) (ii) C6H5NH2 + Br2(aq) (iii) CH3CONH2 ( NaOH + Br2) Q8) write the structure of prop-2-en-1-amine Q27) write the main products of following reactions: (i) CH3CH2NH2 (HNO2 , 00C) (ii) C6H5SO2Cl + C2H5NH2 (iii) C6H5NH2 + CH3COCl (base) QUESTION BANK (BIOMOLECULES) MARKS SAMPLE PAPER- (OLD) Q8) What type of linkage holds together the monomers of DNA? Q27) An optically active compound having M.F.C6H12O6 is found in two isomeric forms (A) & (B) are dissolved in water they show the following equilibrium (A) ↔ Equilibrium Mixture ↔ (B) 0 111 52.2 19.20 (i) What are such isomers called? (ii) Can they be called enantiomers ? Justify your answer (iii) Draw the cyclic structure of isomer (A) Q27)An optically active amino acid (A) can exist in forms depending on the pH of the medium.if the M.F of (A) is C3H7NO2 write (i) Structure of compound (A) in aqueous medium What are such ions called? (ii)In which medium will the cationic form of compound (A) exist? (ii) In alkaline medium, towards which electrode will the compound (a) migrate in electric field? SAMPLE PAPER- (OLD) Q12) Name the two components of starch How they differ from each other structurally? Q13)(a) What changes occur in nature of egg protein on boiling? (a) Name the type of bonding which stabilizes α- helix structure in proteins SAMPLE PAPER- (OLD) Q8) Except for vit.B12, all other vitamins of group B should be supplied regularly in diet Why? Q25) Despite having a -CHO gr (a) Glucose does not give 2,4 –DNP test What does this indicate? (b) Draw the Haworth structure of α-D-(+) glucopyranose (c) What is the significance of D & (+) here 2008 D Q14) Define in relation to protein(i) peptide linkage(ii) denaturation Q15)List the reactions of glucose which can not be explained by its open structure 2008 AI Q7) Write two main functions of carbohydrate in plants Q26) What happens when D-glucose is treated with the following reagents(i)HI(ii)Br2 water (iii)HNO3 Q16) How are vitamins classified? Mention the chief sources of vit.A & vit C Q17) Describe with example (i) Glycosidic linkage(ii)peptide linkage Q17)Describe with reference to protein (i)Primary structure of Protein (ii)Denaturation 2008 F Q17)List any four vitamins Mention the chief sources & functions of two of them Q7) Write two main functions of carbohydrate in plants Q26)What are nucleic acids? Mention two of their important functions 2008 D COMPTT Q7) Why are carbohydrates generally optically active? Q26) What are amino acids? On electrolysis in an acidic solution, the relevant anions migrate towards the cathode while in alkaline solution they migrate towards the anode Give reason Q16) What are essential & non essential amino acids? Give one example of each type Q17)Mention the type of linkages responsible for formation of (i)Primary structure of protein(ii)cross linking of polypeptide chains(iii)α- helix formation(iv)β – sheet structure 2008 AI COMPTT Q11) When RNA is hydrolysed, there is no relationship among the quantity of different bases formed What does this fact suggest about the structure of RNA? Q16) Explain the amphoteric behaviour of amino acid Q26) (a) Which forces are involved in holding the substrate molecule to the active site of enzymes?(b) Name the receptor macromolecules that are chosen as drug targets 2009 AI Q16) Name the four bases present in DNA Which one of these is not present in RNA? Q17) Name two fat soluble vitamins ,their sources & the diseases caused due to Their deficiency in diet 2009 D Q16) Describe with example (i) Glycosidic linkage(ii)peptide linkage Q17 ) Name two water soluble vitamins ,their sources & the diseases caused due to their deficiency in diet 2009 F Q17) What are (i) Invert sugar (ii) Poly peptide Q18) State what are the following & how they differ from each other (i) Nucleotide (ii)nucleoside 2009 D COMPTT Q8) What is the structural feature characterising reducing sugar? Q20) (a) What is the structural difference between a nucleoside & a nucleotide? (b) The two strands in DNA are not identical but are complementary Explain Q26)(a)Write the important structural difference between DNA & RNA? ( b )Mention the names of bases produced on hydrolysis of DNA Q22) Name the chemical component which constitute nucleotide Write any four functions of nucleotides in a cell 2010 AI Q7) What is meant by reducing sugars? Q26) Amino acids may be acidic ,alkaline , or neutral.How does this happens? What are essential and non essential amino acids? Name one of each type Q6) What are mono saccharides? Q26) Differentiate between fibrous protein and globular protein.What is meant by denaturation of protein? Q8) What are the products of hydrolysis of sucrose? 2010 D Q17)Explain the following: (i) Invert sugar (ii) poly peptides Q17) Name the products of hydrolysis of sucrose.Why is sucrose not a reducing sugar? Q18) What are essential and non essential amino acids in human food? Give one example of each type Q18) State clearly what are known as nucleosides and nucleotides? 2010 F Q8) What happens when glucose is treated with Br2 water? Q25) Explain the following: (i) Invert sugar (ii) poly peptides (iii) Denaturation of protein Q25) Mention three such facts/ reactions about glucose which can not be explained by its open chain structure What is meant by pyranose structure of glucose? NEW SAMPLE PAPER I Q25) (a) Give one reaction of D-glucose which can not be explained by its open chain structure (b) Give one example of each for essential and non essential amino acids ( c) Differentiate between keratin and insulin NEW SAMPLE PAPER II Q5) What type of linkage holds together the monomers of DNA? Q21) (a) Write the zwitter ion structure of glycine (b) What is meant by inversion of sugar ( c ) Name the vitamin in each case whose deficiency causes (i) Nightblindness (ii) Poor coagulation of blood NEW SAMPLE PAPER III Q8) What are the ultimate products of digestion of protein ? Q21) (a) Give reasons: (i) glucose does not give 2,4-DNP test and Sciff’s test (ii) Amino acids have high m.p and are soluble in water (b) What is meant by the secondary structure of protein 2011 AI Q17) Explain what is meant by the following: (i) Peptide linkage (ii) Pyranose structure of glucose Q18) Write the main structural difference between DNA and RNA.Of the four bases ,name those which are common to both DNA and RNA Q18) Write such facts/ reactions about glucose which can not be explained by its open chain structure 2011D Q16) What is essentially the difference between alpha form and beta form of Glucose? Q17) Describe what you understand by primary and secondary structure of protein 2011 F Q16) Explain what is meant by (i) Peptide linkage (ii) Pyranose structure of glucose Q17)Name the products of hydrolysis of (i) sucrose (ii) lactose Q17) Mention three such properties of glucose which can not be explained by its open chain structure 2010 D COMPTT Q8)What is the structural feature characterizing reducing sugar? Q20) (a) What is the structural difference between a nucleoside and nucleotide? (b ) The two strands in DNA arenot identical but are complementary Explain Q1) What are the expected products of hydrolysis of lactose? Q26) (a) Write the important structural difference between DNA and RNA (b ) Mention the names of bases produced on hydrolysis of DNA Q6) Give an example of the following (a) Reducing sugar (b) Non reducing sugar Q22) Name the chemical components which constitute nucleotides Write any four functions of nucleotides in a cell 2010 AI COMPTT Q17) What are vitamins? Deficiency of which vitamin causes (i) pernicious anaemia (ii) convulsions Q18) Enumerate the reactions of D-glucose which can not be explained by its open chain structure Q9)What happens when D-glucose is treated with the following: (i) HI (ii) Bromine water Q15) What are the products of hydrolysis of the following (i) Lactose (ii) A nucleotide from DNA containing thymine 2012AI Q7) write the structure of the product obtained when glucose is oxidized with nitric acid Q26) what is essentially the difference between ∞ - glucose and ß-glucose?what is meant by pyranose structure of glucose? Q7) write a reaction which shows that all the carbon atoms in glucose are linked in a straight chain Q26)define the following as related to proteins: (i) Peptide linkage (ii) Primary structure (iii) Denaturation 2012 D Q16) What is meant by (i) Peptide linkage (ii) Biocatalyst Q17) Write any two reactions of glucose which can not be explained by the open chain structure of glucose molecule Q18) Write the main structural difference between DNA and RNA Of the two bases, thymine and uracil,which one is preset in DNA? 2012 F Q7) Write the full forms of DNA and RNA Q26) What is glycogen? How is it different from starch? How is starch structurally different from cellulose? Q8) Of the two bases named below,which one is present in RNA and which one is present in DNA (i) Thymine (ii) Uracil Q26) Explain the meaning of the following terms: (i) Invert sugar (ii) Polypeptides (iii) Enzymes Q26) Write three such behavior of glucose which can not be explained by the open chain structure of glucose molecule What alternative structure has been proposed for the glucose molecule? 2013 AI Q7) what are the products of hydrolysis of sucrose? 27) Shanti, a domestic helper of Mrs Anuradha, fainted while mopping the floor.mrs Anuradha immediately took her to a nearby hospital where she was diagnosed to be severely anaemic.The doctor prescribed an iron rich diet and multivitamins supplement to her Mrs.Anuradha supported her financially to get the medicines After a month, Shanti was diagnosed to be normal After reading the above passage,answer the following questions: (i) What values are displayed by Mrs.Anuradha? (ii) Name the vitamin whose deficiency causes pernicious anaemia (iii) Give an example of water soluble vitamin Q7) write the name of linkage joining two amino acids Q5) what are the products of hydrolysis of lactose? Question Bank (Polymers) marks SamplePaper – I (Old) Q5) Name the monomers of Nylon-2-Nylon-6 polymer Q17) Differentiate the following pair of polymers based on the property mentioned against each a) Novolac & Bakelite (structure) b) Buna-S & Terylene (intermolecular force of attraction) SamplePaper – II (Old) Q20) Write the names of monomers & classify them as addition or condensation polymers (a) Teflon (b) Bakelite (c) Natural rubber SamplePaper – III (Old) Q26) (a)What is the role of Benzoyl peroxide in the polymerization of ethane? (b)What are LDPE & HDPE? How are they prepared? 2008 – D Q27)Write the names & structures of the monomers of given polymers (a) Buna-S (b) Neoprene (c) Nylon-6 2008 – AI Q8) Define polymerization Q18) What are thermosetting & thermoplastic polymers? Give one example of each Q18) Distinguish between homopolymer & copolymer & give an example of each class 2008 – F Q8) What is the repeating structural unit in polythene polymer? 2008 – comptt D Q27) (b)Is –(CH2CHC6H5)n a homopymer or copolymer? Why? Q8) What is the difference two notations Nylon-6 & Nylon-6,6 ? Q18) What is step growth polymerization? Explain the steps involved in the process Q18)What is the difference between elastomers & fibres ? Give one example of each 2009 – AI Q8) What does 6,6 indicate in the name Nylon -6,6 ? Q18) Differentiate between molecular structure & behaviour of thermoplastic & thermosetting polymers.Give one example of each type Q8) What is the primary structural feature necessary for a molecule to make it useful in condensation polymerization reaction? Q17) Differentite between condensation and addition polymerization.Give one example of each of the resulting polymers 2009 – D Q7) Give an example of elastomers Q18) Draw monomers of Teflon & polythene Q18) What is the repeating unit in the condensation polymer obtained by combing HOOC-CH2-CH2-COOH (succinic acid) & H2N-CH2-CH2-NH2 (ethylene diamine) 2009 – F Q27) Differentite between mode of formation of condensation &addition polymerization.Give one example of each of these formation Q27) Draw molecular structure of monomers of (i) PVC (ii) Teflon(iii) Neoprene 2009 – D(COMPTT) Q21) What are biodegradable polymers? Give an example of such polymer & mention its uses 2010 - AI Q8) What does the designation 6,6 mean in the name of nylon – 6,6? Q18) Draw molecular structure of monomers of (i) PVC (ii) Teflon 2010 - AI Q8) What is meant by coplymerisation? Q18) Draw molecular structure of monomers of (i) Bakelite (ii) Nylon -6 2010 – D Q26) Give one example of each (i) Addition polymers (ii) Condensation polymers (iii) Copolymers Q25) Write the name and structure of monomers of each polymer (i) Neoprene (ii) Buna-S (iii) Teflon Q26) Differentiate between thermoplastic and thermosetting polymers Give example of each 2010 – F Q26) Identify the four groups into which the polymers are classified on the basis of the magnitude of intermolecular forces present in them.To which group or groups polythene and Bakelite belong? Q27) Write the name and structure of monomers of each polymer (i) Polyvinyl chloride (ii)Bakelite (iii) Teflon Sample Paper - I-(New) Q25) (a)Identify aliphatic biodegradable polyester which is used in packaging and orthopedic devices (i) Write its full form (ii)Give the structures of monomers from which it is formed (iii) Show the formation of polymer (b) Write the name and structure of monomer of nylon-6 Sample Paper - II-(New) Q20)(a)Write a reaction involved in the preparation of a biodegradable polyester (b) Monomer unit of synthetic rubber (neoprene) ( c )One use of Nylon-6,6 Sample Paper - III-(New) Q22) (a)Give an example of synthetic rubber and mention its one example ( b) Write the structures of monomers of Dacron ( c ) Arrange the following in increasing order of their tensile strength Nylon ,Buna-S ,Polythene A I-2011 Q26)Draw the structures of monomers of (i) Polythene(ii) PVC(iii)Teflon Q26) Write the name and structures of the following polymers: (i) Buna-S (ii)Dacron (iii) Neoprene 2011 D Q8) What are biodegradable polymers? Q18) Mention two important uses of each (i) Bakelite (ii) Nylon – Q8) In nylon 6,6 what does the designation 6,6 mean? Q18) Name the subgroups into which polymers are classifiedon the basis of magnitude of intermolecular forces 2011 F Q27) Mention two important uses of each (i) Bakelite (ii) Nylon-6,6 (iii) PVC Q27) (a)What does the designation 6,6 mean in Nylon 6,6 polymer? (b ) Which polymer is obtained when free radical polymerization of chloroprene occurs? Write the structure of polymer thus obtained Q27) What are addition polymers? How are the two types of addition polymers different from each other? Give one example of each type 2010 D COMPTT Q21) What are biodegradable polymers? Give an example of such a polymer and mention its uses 2010 AI COMPTT Q26) Write the (i) structure and (ii) one use of each of the following polymers (a) PVC (b) Urea-formaldehyde resin (c) Bakelite 2012AI Q27) differentiate between thermoplastic and thermosetting polymers Give one example of each type Q27) Explain the following terms giving example for each: (i) Elastomers (ii) Condensation polymers (iii) addition polymers 2012 D Q8) Define the term, ‘homopolymerisation’ giving an example Q18) Draw the structure of monomers for each of the following polymers: (i) Nylon-6 (ii) Polypropene 2012 F Q18) Draw the structure of monomers for each of the following polymers: (i) Nylon-6 (ii) Teflon (iii) Neoprene 2013 AI Q8) Is (-CH2-CH)-n a homopolymer or a copolymer? I Cl Q18) Define thermoplastic and thermosetting polymers Give one example of each Q18) What is a biodegradable polymer? Give an example of a biodegradable aliphatic polyester Q8) Give one example of a condensation polymer Q6) Is (-CH2-CH)-n a homopolymer or a copolymer? I C6H5 Question Bank (Chemistry in Everyday life) marks SamplePaper – I (Old) Q6) Give one example of artificial sweetener used by diabetic patients Q18) In order to wash clothes with water containing dissolved calcium bicarbonate, which cleaning agent will you prefer & why, soap or synthetic detergent? Give one advantage of soap over synthetic detergent SamplePaper – II (Old) Q27) Reasons: a)Aspirin drug helps in prevention of heart attack b) Diabetic patients are advised to take artificial sweetener instead of natural sweeteners c) Detergents are non biodegradable while soaps are biodegradable SamplePaper – III (Old) Q27) Classify synthetic detergents giving an example in each case Q27) What are antihistamine? Give two examples Explain how they act on the human body 2008 - D Q8) Name a substance that can be used as an antiseptic as well as disinfectant Q18) What are biodegradable & non biodegradable detergents? Give one example of each class 2008 – AI Q27) Mention one use of each: a) Ranitidine b) Paracetamol c) Tincture of iodine 2008 – F Q27) a) What is the problem with hard water for washing with soap? a) Explain (i) Broad spectrum antibiotics (ii) non ionic detergents 2008 –D –COMPTT Q8) What is meant by Broad Spectrum Antibiotics? Q18) Discuss the two ways in which drug prevent attachment of natural substrate on active site of enzyme Q18) Explain with example: a) cationic detergent b) Tranqulizers 2008 –AI –COMPTT Q27) (a) What are antihistamine? Give two examples Explain how they act on the human body.Give an example (b)Name a substance that can be used as an antiseptic as well as disinfectant 2008 –AI –COMPTT Q19) What are antibiotics? Distinguish between narrow spectrum & broad spectrum antibiotics.Classify the following into Bactericidal& Bacteriostatic antibiotics Tetracycline , Penicillin 2009- AI Q27) Explain with example: a) Food preservatives b) Disinfectants c) Non ionic detergent Q27) Explain with example : a) Enzymes b) Sweetening agents c) cationic detergent 2009 – D Q27) Explain with example: Analgesic ,Disinfectants, Antacid, Antiseptic Q27) How antiseptics differ from disinfectants ? Give one example of each 2009 –F Q1)Write the name of an antacid which is often used as a medicine Q18) Reasons: (i) Soap not the cleansing in hard water (ii) Synthetic detergents are preferred to soap in washing machine Q8) What is meant by Broad Spectrum Antibiotics? Q17) Explain with example: a) Food preservatives b) cationic detergent 2009 – D-COMPTT Q22) What are anionic detergents ?How are they prepared ?Write their two uses Q24) What are artificial sweetening agents ?Give two examples Name the sweetening agents used in the preparation of sweets for diabetic patient Q20)(a) Define the term chemotherapy (b)While antacid & antiallergic drugs interfere with the function of histamine ,why these not interfere with the function of each other 2010- AI (I) Q27)Explain the following with one example : (i) Food Preservation (ii) Enzymes (iii) Detergents 2010 – AI (II) Q27) What are analgesic drugs?How are they classified and when are they usually recommended for use? 2010 – AI (III) Q27)Explain the following with one example : (i) Antibiotics (ii) Antiseptics (iii) Analgesic 2010 –D Q27) What are analgesic medicines?How are they classified and when are they commonly recommended for use? Q27) Explain with one suitable example (i) Cationic detergent (ii) Enzymes (iii) Anti fertility drugs 2010 –F Q27) How antiseptics differ from disinfectants? Name a substance that can be used as an antiseptic as well as disinfectant Q26) What are biodegradable and non biodegradable detergents? Give one example of each Is there any structural difference between the two Sample Paper - I-(New) Q26) (a) Justify the following: (i) Sleeping pills are recommended to patients suffering from sleeplessness but it is not advisable to take them without consulting the doctor (ii) Why we require artificial sweetening agents? (b)Write the composition of Dettol Sample Paper -II-(New) Q(25) (a)Name a substance which can act as both(i) analgesic and antipyretics (ii) antiseptic and disinfectant (d) Explain the following with suitable example: (i) Broad spectrum antibiotics (ii) Anionic detergents Sample Paper -III -(New) Q(23) Give one example of each (g) An artificial sweetener whose use is limited to cold drink (h) A non ionic detergent (i) A pain reliever used for relief from severe pain like postoperative or pain due to terminal cancer 2011 AI Q27) What are the following substances?Give one example of each (i) Food preservatives (ii) Synthetic detergents (iii) Antacid Q27)(a) Differentiate between a disinfectant and an antiseptic Give one example of each (c) What is tincture of iodine and what is it used for? 2011 D Q27) Describe the following giving one example for each (I ) detergent (ii) food preservative (iii) antacid Q27) Explain the following with suitable example (I ) sweetening agent for diabetic patients (ii ) enzymes (iii ) analgesics Q27) (I ) Why soap not work in hard water? (ii ) What are the main constituents of dettol? (iii )How antiseptics differ from disinfectant? 2011 F Q8) What is meant by a Broad spectrum antibiotics? Q18) Give reasons: (a) Soap not work well in hard water (b) Synthetic detergents are better than soap Q8) What are antiseptics? Give one example Q18) Explain with example (a) Antacid (b) Sweetening agent 2010 D comptt Q22) What are anionic detergents? How are they prepared? Write their two main uses Q24) What are artificial sweetening agents? Give two examples Name the sweetening agent used in the preparation of sweets for a diabetic patients Q20) (a) define the term chemotherapy (b ) While antacid and antiallergic drugs interfere with the function of histamines,why these not interfere with the function of each other? 2010 AI COMPTT Q27) Explain the following terms with suitable examples (d) Cationic detergent (e) Broad spectrum antibiotics (f) Tranquilizer Q19) Explain the following terms: (j) Anionic detergent (k) Chemotherapy (l) Analgesics Q26) Explain the following terms with one suitable example (i) Non ionic detergent (j) Antiseptic (k) Antibiotic 2012AI Q8) Differentiate between disinfectants and antiseptics Q18) what are food preservatives?Name two such substances Q17) explain the cleansing action of soap.why soap not work in hard water? Q8) what is the cause of a feeling of depression in human beings?Name a drug which can be useful in treating this depression Q18) differentiate between disinfectants and antiseptics give example of each group 2012 D Q27)What are the following substances? Give one example of each one of them (i) Tranqilizers (ii) Food preservatives (iii) Synthetic detergent Q27) Explain the following terms giving one example of each type: (i) antacid (ii) disinfectants (iii) enzymes 2012 F Q8) What is meant by ‘narrow spectrum antibiotics’ ? Q18) State a reason for each of the following statements: (i) soap does not work in hard water (ii) The use of the sweetner aspartame is limited to cold foods and drinks Q18) What are biodegradable and non biodegradable detergents? Give one example of each 2013 AI Q25) (i) What class of drug is Ranitidine? (ii ) If water contains dissolved Ca2+ ions, out of soaps and synthetic detergents,which will you use for cleaning clothes? (iii ) Which of the following is an antiseptic? 0.2 % phenol , 1% phenol ********************* ... preparation of pure alumina from bauxite ore 2011 D Q22) Repeated questions Q22) Repeated questions 2011 F Q21) Repeated questions Q21) Repeated questions 2010 D COMPTT Q26)Give reasons for the following... nth order reaction : Unit of k = (mol/L)1- n s -1 Activation Energy: K = A e –Ea/RT Question Bank (Surface Chemistry) marks SAMPLE PAPER- (OLD) Q21) Consider the adsorption isotherm given & interpret... ½ ,for DEGREE OF DISSOCIATION α = i - / n -1 DEGREE OF ASSOCIATION α = i - / 1/n -1 Question Bank (Electrochemistry) marks SAMPLE PAPER- (OLD) Q12) Write the chemical equations for the steps