Prototype Nickel Tin Catalytic Converter
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. 3. 4. 5. 6. Write a feature which will distinguish a metallic solid from an ionic solid. Define ‘order of a reaction’. What is an emulsion? Why does NO2 dimerise ? Give an example of linkage isomerism. A solution of KOH hydrolyses CH3CHClCH2CH3 and CH3CH2CH2CH2Cl. Which one of these is more easily hydrolysed? Draw the structural formula of I-phenylpropan-l-one molecule. Give the IUPAC name of H2N – CH2 – CH2 - CH = CH2. 1 1 1 1 1
1 1 1
7. 8.
174
9.
Non-ideal solutions exhibit either positive or negative deviations from Raoult’s law. What are these deviations and why are they caused? Explain with one example for each type. A reaction is of first order in reactant A and of second order in reactant B. How is the rate of this reaction affected when (i) the concentration of B alone is increased to three times (ii) the concentrations of A as well as B are doubled? The rate constant for a reaction of zero order in A is 0.0030 mol L –1 s –1. How long will it take for the initial concentration of A to fall from 0.10 M to 0.075 M ? Draw the structures of white phosphorus and red phosphorus. Which one of these two types of phosphorus is more reactive and why? Explain the following observations: (i) Generally there is an increase in density of elements from titanium (Z = 22) to copper (Z = 29) in the first series of transition elements. Transition elements
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. 3. 4. 5. 6. Write a feature which will distinguish a metallic solid from an ionic solid. Define ‘order of a reaction’. What is an emulsion? Why does NO2 dimerise ? Give an example of linkage isomerism. A solution of KOH hydrolyses CH3CHClCH2CH3 and CH3CH2CH2CH2Cl. Which one of these is more easily hydrolysed? Draw the structural formula of I-phenylpropan-l-one molecule. Give the IUPAC name of H2N – CH2 – CH2 - CH = CH2. 1 1 1 1 1
1 1 1
7. 8.
174
9.
Non-ideal solutions exhibit either positive or negative deviations from Raoult’s law. What are these deviations and why are they caused? Explain with one example for each type. A reaction is of first order in reactant A and of second order in reactant B. How is the rate of this reaction affected when (i) the concentration of B alone is increased to three times (ii) the concentrations of A as well as B are doubled? The rate constant for a reaction of zero order in A is 0.0030 mol L –1 s –1. How long will it take for the initial concentration of A to fall from 0.10 M to 0.075 M ? Draw the structures of white phosphorus and red phosphorus. Which one of these two types of phosphorus is more reactive and why? Explain the following observations: (i) Generally there is an increase in density of elements from titanium (Z = 22) to copper (Z = 29) in the first series of transition elements. Transition elements