Question Paper
CHEMISTRY (Theory)
Time allowed : 3 hours General Instructions: (i) All questions are compulsory. Maximum Marks : 70
(ii) Marks for each question are indicated against it. (iii) Question numbers 1 to 8 are very short-answer questions and carry 1 mark each. (iv) Question numbers 9 to 18 are short-answer questions and carry 2 marks each. (v) Question numbers 19 to 27 are also short-answer questions and carry 3 marks each. (vi) Question numbers 28 to 30 are long-answer questions and carry 5 marks each. (vii) Use Log Tables, if necessary, Use of calculators is not allowed.
QUESTION PAPER CODE 56/1/1 1. 2. 'Crystalline solids are anisotropic in nature.' What does this statement mean? Express the relation between conductivity and molar conductivity of a solution held in a cell. Define 'electrophoresis'. Draw the structure of XeF2 molecule. Write the IUPAC name of the following compound: (CH3)3 CCH2Br 6. 7. Draw the structure of 3-methylbutanal. Arrange the following compounds in an increasing order of their solubility in water: C6H5NH2, (C2H5)2NH, C2H5NH2
182
3. 4. 5.
8. 9.
What are biodegradable polymers? The chemistry of corrosion of iron is essentially an electrochemical phenomenon. Explain the reactions occurring during the corrosion of iron in the atmosphere. Determine the values of equilibrium constant (KC) and ∆G for the following reaction: o 10.
Ni(s) + 2Ag+ (aq) → Ni2+(aq) + 2Ag(s), E = 1.05 V o (IF = 96500 C mol ) 11. 12. Distinguish between 'rate expression' and 'rate constant' of a reaction. State reasons for each of the following: (i) (ii)
− The N – O bond in NO − is shorter than the N – O bond in NO 3 . 2
–1
SF6 is kinetically an inert substance. OR
State reasons for each of the following: (i) (ii) 13. All the P-Cl bonds in PCl5 molecule are not equivalent. Sulphur has greater tendency for catenation than oxygen.
Assign reasons for the following: (i) (ii) Copper (I) ion is not known in aqueous solution.
Time allowed : 3 hours General Instructions: (i) All questions are compulsory. Maximum Marks : 70
(ii) Marks for each question are indicated against it. (iii) Question numbers 1 to 8 are very short-answer questions and carry 1 mark each. (iv) Question numbers 9 to 18 are short-answer questions and carry 2 marks each. (v) Question numbers 19 to 27 are also short-answer questions and carry 3 marks each. (vi) Question numbers 28 to 30 are long-answer questions and carry 5 marks each. (vii) Use Log Tables, if necessary, Use of calculators is not allowed.
QUESTION PAPER CODE 56/1/1 1. 2. 'Crystalline solids are anisotropic in nature.' What does this statement mean? Express the relation between conductivity and molar conductivity of a solution held in a cell. Define 'electrophoresis'. Draw the structure of XeF2 molecule. Write the IUPAC name of the following compound: (CH3)3 CCH2Br 6. 7. Draw the structure of 3-methylbutanal. Arrange the following compounds in an increasing order of their solubility in water: C6H5NH2, (C2H5)2NH, C2H5NH2
182
3. 4. 5.
8. 9.
What are biodegradable polymers? The chemistry of corrosion of iron is essentially an electrochemical phenomenon. Explain the reactions occurring during the corrosion of iron in the atmosphere. Determine the values of equilibrium constant (KC) and ∆G for the following reaction: o 10.
Ni(s) + 2Ag+ (aq) → Ni2+(aq) + 2Ag(s), E = 1.05 V o (IF = 96500 C mol ) 11. 12. Distinguish between 'rate expression' and 'rate constant' of a reaction. State reasons for each of the following: (i) (ii)
− The N – O bond in NO − is shorter than the N – O bond in NO 3 . 2
–1
SF6 is kinetically an inert substance. OR
State reasons for each of the following: (i) (ii) 13. All the P-Cl bonds in PCl5 molecule are not equivalent. Sulphur has greater tendency for catenation than oxygen.
Assign reasons for the following: (i) (ii) Copper (I) ion is not known in aqueous solution.