1. Select the correct statements w.r.t. defects in crystals:(a) The ionic crystal of AgBr has schottky defect.(b) In ionic compounds having frenkel defect, the ratio is high.(c) Schottky defects decreases density of the crystal.(d) Doping of AgCl crystals with results in formation of F –centers.

2. During the purification of copper by electrolysis:(a) the anode used is made of copper ore(b) pure copper is deposited on the cathode(c) the impurities such as Ag, Au present in solution as ions(d) concentration of solution remains constant during dissolution of Cu

8.A,C 9.A,B,D

1. For which of the following crystal system interfacial angle relation is (a) orthorhombic (b) trigonal (c) tetragonal (d) cubic

2. Which of the following statement (s) is (are) correct?

(a) below 1250 K, C and CO can’t reduce

(b) From 1250 K onwards CO can reduce

(c) Point P in the diagram represents melting point of Zn.

(d) Below 983K, is the thermodynamically favorable compared to

3. If and are mole fractions of liquid A in liquid and vapour phase respectively and plots of

and is linear then the slope and intercept will be respectively

(a) and (b) and (c) and (d)

and

4. White phosphorous has

(a) Six P – P single bonds (b) four P – P single bonds(c) Four lone pairs of electrons (d) PPP is 60°

5. Roasting of sulphide ore is done before smelting(a) because sulphide cannot be reduced easily as oxide by carbon reduction(b) to remove moisture and volatile impurities(c) to remove earthen impurities(d) All of the above

1.A,C,D 2.A,D3. A 4. A, C, D 5. A, B

1. In anti fluorite structure, which of the following are correct(a) oxide ions are form fcc lattice(b) cations are present in all tetrahedral voids

(c)

(d) Coordination number of ion is 4 and that of is 8.

2. Bleaching powder can acts as(a) Bleaching agent (b) Oxidizing agent (c) Reducing agent (d)

Chlorinating agent3. Which of the following is / are correct

(a) exist as and at room temperature (b) Hypo is used as antichlor(c) Bleaching powder is mixed salt (d) NO is paramagnetic, acidic

oxide

4. Which of the following is / are aerosol (s)?(a) smoke (b) cloud (c) milk (d) fog

5. The vapour pressure of a solution of 5g of non – electrolyte in 100g of water at a particular temperature is 2985 . The vapour pressure of pure water at that temperature is 3000 . The non – volatile solute may be

(a) urea (b) fructose (c) glucose (d)

11. A, B, C, D 12. A, B, D 13. A, B, C 14. A, B, D 15. B, C

1. If , , then which of the following is/are feasible cell(s).

(a) (b) (c) (d)

2. Given the following two half reaction

of the reaction (a) -1.13 V and not spontaneous (b) + 1.13 V and spontaneous(c) 0.73 and spontaneous (d) -0.73 and non

spontaneous1. A,C,D

2.B

One or more than one correct option questions 1. Which of the following statement (s) is (are) correct?

(a) dissolves in HF without any chemical reaction but dissolves in HF because of a chemical reaction

(b) disproportionates in water to give (c) cannot be stored in glass vessels(d) The order of bond angles in , , is

2. Which one of the following statement(s) is/ are false?(a) weak ligands like usually form low spin complexes(b) strong ligands like , generally form high spin complexes

(c) is high spin complex

(d) is high spin complex

3. Which of the following statement (s) is (are) correct?(a) If freshly prepared precipitate of stannic oxide is peptised by a small amount of KOH, the

sol carries a negative charge

(b) If a dilute solution of Kl is added to a slight excess of solution, a positively charged sol of AgI is obtained.

(c) If freshly prepared precipitate of stannic oxide is peptised by a small amount of HCl, the sol carries positive charge

(d) ) If a dilute solution of is added to a slight excess of Kl solution, a negatively charged sol of AgI is obtained. 4. Vapour pressure of A and B ideal mixture at 313K are given by P (in mm) = is

mole fraction of A. Which of the following statement (s) is (are) wrong?(a) Vapour presure of pure B is 160 mm(b) Vapour pressure of pure A is 60 mm(c) Solution which is having 4 moles of B and 1 mole of A has the vapour pressure 88mm.(d) To the above solution (Solution in option c), if 1 mole of non-volatile solute is added, the

vapour pressure of solution is 66.67 mm (approx).

1. A,C 2.A,B,D 3.A,B,C,D 4.A,B,C

6. Select the correct statement(a) for ideal solution(b) Liquid mixture of two optical isomers of forms an ideal solution(c) When 30.0 mL of a 15 weight percent HCl (aq) solution is added to 50 mL of a 15.0

weight percent solution at constant T and P, the final volume must be 80mL

(d) If a solute partly dimerizes in a solvent, the freezing point of the solution is less than it would be if the solute did not dimerize.

7. Select the correct statement(a) When chlorine gas is bubbled through a solution of ferrous bromide, it results in the

evolution of Bromine gas.(b) When Se is treated with conc it will be oxidized to (c) Sodium perbromate is obtained when sodium bromate reacts with fluorine in presence of

Alkali(d) Fluorine cannot be prepared from fluorides by chemical oxidation

8. Which of the following statements are true(a) For chemisorptions

(b) Colloidal solution on electro osmosis, dispersed phase move towards anode(c) Ti, Zr, Ge and Fe metals are purified by vapour phase refining(d) Colloid can be coagulated effectively the addition of rather than

NaCl solution Of same molarity 6. A,C 7.A,C,D 8.A,D

One or more than one correct option questions

1. Select the correct statement:(a) Addition of non volatile solute to a pure solvent at constant Temprature always results in lowering of vapour Pressure ideal.(b) The vapour pressure of a ideal solution of A and B at a particular temperature T is always less than the vapour pressure of pure A and pure B at same temprature(c) At melting point of substance vapour pressure of solid is equal to the vapour pressure of liquid.(d) The system’s temperature remains constant during the formation of ideal solution .

2. Select the correct statements(a) does not exist(b) S-S sigma bond is present in where as does not contain S-S sigma bond(c) Hypophosphoric acid contains p-p bond where as polymetaphosphoric acid does

not have any p-p bond(d) is diamagnetic where as is paramagnetic

3. Which of the following oxide (s) is (are) acidic in nature?

(a) (b) (c) (d)

4. Vapour pressure of A and B mixture at 313K are given by p (in mm) = is mole fraction of A. Which of the following statement (s) is (are) correct?

(a) Vapour presure of pure B is 60 torr(b) vapour pressure of pure A is 160 torr(c) solution which is having 4 moles of B and 1 mole of A has the vapour pressure 80 torr.(d) To the above solution ( solution in option c), if 1 mole of non-volatile solute is added, the

vapour pressure of solution is 66.66 torr.

1.ABCD 2.ABCD 3.ABD 4.ABCD

1. Which of the following statement is correct?If and ,

(a) ions can be reduced by (b) Cu can be oxidized by (c) ions can be reduced by (d) Sn can be oxidized by

2. In the decay process

(a) A and B are isobars (b) A and D are isotopes(c) B, C and D are isobars (d) A and C are isotones

3. Which of the following are coordination isomers of

(a) (b)

(c) (d) None of these

4. A yellow precipitate is obtained when:(a) lead acetate solution is treated with KI (b) solution is treated with KBr(c) solution treated with KI (d) is passed through a solution of

6.A,D 7.B,C 8.A,B 9.A,C,D

One or more than one correct option questions

1. Complex ions are similar in which of the following pairs of properties?

(a) oxidation state of the central ion and its hybridisations(b) coordination number and effective atomic number(c) magnetic moment and hybridization

(d) oxidation state of the central ion and its magnetic moment

2. Which statements about corrosive sublimate are correct?(a) It sublimes on heating(b) It oxidizes stannous chloride(c) It is highly poisonous(d) It is prepared by heating mercury in an atmosphere of chlorine

3. and ions are precipitated together by addition of (a) (b) (c) aq.HCl (d)

4. Which of the following reagents give positive test with glucose?(a) Fehling’s Reagent (b) aq.Bromine (c) (d)

solution

6.A,B 7.A,B,C,D 8.C,D 9.A,B

One or more than one correct option questions

1. The oxidation potential of hydrogen half-cell will be negative if:(a) atm and M (b) atm and M

(c) atm and M (d) atm and

M

2. Select the correct statement(s):(a) The rate of reaction decreases with decrease in temperature(b) The rate of reaction is uniform in zero order reaction(c) The rate of reaction depends upon the surface area of the solid reactants(d) Average and instantaneous rate of reaction defined for micro and macro-scopic time interval

respectively

3. Which of the following pairs show coordination isomerism?(a) and

(b) and

(c) and

(d) and

4. Which of the following would produce reddish brown vapours when concentrated is added to it?

(a) NaCl (b) (c) (d)

6.A,B,C 7.A,B,C 8.A,D 9.C,D

Numerical

N1. How many of the following reactions give ?

N2.

10% sites of catalyst bed have adsorbed by . On heating gas is evolved completely from sites and collected at 0.05 atm and 300k in small tube of 0.246 dm3. The number of sites available is 6×1018 per cm2 and surface area is 1000 cm2. Find the out the number of surface sites occupied by

per molecule of .

N3.The freezing point depression of 0.001M is . Determine the value of x

. Take the nearest integer.

N4. Density of lithium atom is 0.53 g/cm3. The edge length of Li is 3.5 . The number of lithium atoms in a unit cell will be (to the nearest integer)______

N5. If the vapour pressure of pure A and pure B at 298K are 60 and 15 torr respectively, what would be the mole fraction of A in vapour phase (at this temperature) in a solution that contains 20 mole percent of A in the (A + B) binary mixture in the liquid phase? (express the answer as multiple of 0.5)

N1. 3 N2. 2 N3. 3 N4. 2 N5. 1

Numerical

N1.How many of the following are having atleast one S-S linkage? (atleast one covalent bond between sulphur atoms)

N2. The resistance of 0.1N solution of formic acid is 200 ohm and cell constant is . Find the equivalent conductance (in S ) of 0.1N formic acid. Let this value be x. Report the

value of (x/100).

N3. The emf. of a cell corresponding to the reaction, is 0.28 volts at . Find the pH of the

solution of the hydrogen electrode, to the nearest integer. Given:

N4. What is the sum of the solution numbers of first two solutions, when we arrange the given solutions in decreasing order of their osmotic pressure.

Solution .No Solution1. 0.1 M glucose2. 0.1N KCl3. 0.1N 4. 0.1N

N5.If the radius of is 169 pm, and that of is 181 pm, then find the coordination number of .

N6. Find the magnetic moment of the complex, to the closest integer.

N7. How many of the following compounds are having more than two lone pair of electrons?

N8. An orange solid (A) on heating gives a green residue (B), a colourless gas (C) and water vapour. The dry gas (C) on passing over heated Mg gave a white solid (D). (D) on reaction with water gave a gas (E) which forms dense white fumes with HCl. Find the oxidation state of central atom in green residue (B).

N1.4 N2.1 N3.9 N4.5 N5.8

N6.4 N7.7 N8.3

Numerical

N1. Sucralose is times sweeter than an sugar value of ‘x’ is _______.

N2. One mole of Glyceryl palmitate is subjected to hydrolysis & the obtained carboxylic acid required 500ml of _____ mole caustic potash for complete neutralization.

N3. Rate of decomposition of substance is increased by 2.25 for 1.5 times increase in concentration of substance at same temperature order of reaction is ______.

N4. For the formation of NOBr in following two stepsStep 1 :

Step 2 :

Order of reaction w.r.t NO is ______ .

N5. Ka of Acetic Acid is moles lit, If 0.05N solution has equivalent conductance of

7.36 mno at . Then ‘x’ is ______.

N6. Number of geometrical isomers possible for complex

N7. Number of moles of red vapours produced when one mole of acidified is treated with excess NaCl solution is _______

N8. When alanine, glycine, tyrosine forms tripeptide, x number of tripeptides are possible. If

. What is ‘y’ value _________N1.6 N2.6 N3.2 N4.2 N5.5

N6.3 N7.2 N8.6

Chemistry Section – II

2 Mark Questions1. A binary solid has a rock salt structure. If the edge length is 400 pm and radius of cation is

75 pm, then find the radius of anion in metre.

2. A 1% KCl solution is ionized to the extent of 82%. What would be its osmotic pressure at

?

3. Define (a) Micelles (b) Calcination

4. (a) what happens when a colloidal sol of are mixed?(b) What is Tyndall effect?

5. (a) why liquid rises in a capillary tube when dipped in it? (b) complete the following (i)

(ii)

5 Mark Questions

6. (a) 0.01M solution each of urea, common salt and are taken. Find the ratio of depression of freezing point (b) state Raoult’s law for volatile liquids(c) 1000g of 1M sucrose solution in water cooled to -3.5340C. What weight of ice would be separated out at this temperature?(d) define (i) Boiling point of liquid (ii) Relative lowering of vapour pressure

7. (a) An element having atomic mass 60 has fcc unit cell. The edge length of the unit cell is 400 pm. Find the density of the element (b) Find the vacant space in bcc lattice. (c) Find the coordination of cation in

(ii) Rock salt (b) zinc blende (iii) fluorite (iv) Anti-fluorite structures

CLASS 12B CRP SMT PH-5 CGS ON 26-7-11

2 mark question

1. A first order reaction is 75% completed in 60 minutes. Find of the reaction.

2. A current of 4 amp was passed for 1.5 hours through a solution of copper sulphate when 3.2g of copper was depositel calculate the current efficiency

3. A binary solid has zinc blend structure with B ions constituting the lattice and A+ ions occupying 25% tetrahedral voids. The formula of solid is

4. The bleaches a substance permanently but does it temporarily. Why?

5. In the reaction . Which species acts as Lewis acids.

5 marks question

6. The gas phase decomposition follows the first order rate law. At a given temperature the rate constant of the reaction is sec-1. The initial pressure of is 0.1 atm(i) Calculate the time of decomposition of , so that the total pressure becomes 0.15 atm(ii) What will be total pressure after 150 second

7. Copper crystal has a face centred cubic structure. Atomic radius of copper atom is 128 pm. What is the density of copper metal? Atomic mass of copper is 63.5

8. EMF of the cell is + 0.362 volt at 250C the is – 0.403 volt at the same temperature calculate solubility product of

9. (a) Write the structure of (b) What is the geometry and hybridization of

2 Marks Questions1. of is 140 days. In how many days 1gm of this isotope is reduced to 0.25 gm.2. What is standard hydrogen electrode?3. What is ionisation isomerism in cordination compounds?4. Find ?

5. What is the hybridization of , If its magnetic moment is 5.92 B.M.

5 Marks Questions

6. Define invert sugar. Calculate the specific rotation of invert sugar given that for D-

Glucose & for D – fructose.7. Write the IUPAC name and identify the hybridization, shape and the magnetic behaviour of the

following complexes.(a)

(b)

8. Calculate standard free energy change in kJ for the reaction.

Given,

9. EMF of the cell is + 0.362 volt at 250C the is – 0.403 volt at the same temperature calculate solubility product of

2 Mark Question

1. Find

2. find the value of x and y

3. Write the IUPAC name of the following complex

(a)

(b)

4. Write the main structural difference between amylose and amylopectin

5. Write the monomers of following polymers

(a) Nylon 66 (b) Dacron

5 Mark Questions

6. Find the equilibrium constant for the reaction Given

7. The rate constant for the isomerisation reaction is . If the initial

concentration of A is 1 M. Calculate the rate of the reaction after 1 hour

8. Draw the structure of the following substance

(a) Sucrose (b) Lactose (c) Cellulose also write the structure of their

Acetyl derivative when they are treated with excess acetic anhydride

9. Write the IUPAC name and identify the hybridization, shape and the magnetic behaviour of the following complexes.

(a)

(b)