Physical Chemistry MCQ on Chemical kinetics
Physical Chemistry MCQ on Chemical kinetics
1. The rate of a chemical reaction talks about
(a) The reactants and products taking part in the reaction
(b) The products formed in the reaction
(c) Speed of the reaction
(d) None of the above
Answer (c) Speed of the reaction
2. When the concentration of reactants is unity then the rate is equal to
(a) Specific rate constant
(b) Average rate constant
(c) Instantaneous rate constant
(d) None of the above
Answer: (a) specific rate constant
3. In which state the average rate and instantaneous rate of a reaction are equal
(a) At the start
(b) At the end
(c) In the middle
(d) When two rates have a time interval equal to zero
Answer: (d) when two rates have a time interval equal to zero
4. Choose the incorrect one
(a) Order of a reaction is always a whole number never a fraction
(b) The order of the reaction is does not affected by its stoichiometric coefficient
(c) Order of reaction is may be a whole number or fraction
(d) Order can only be assessed experimentally
Answer: (a) Order of a reaction is always a whole number never a fraction
5. The unit of rate constant of zero-order reactions is
(a) s-1
(b) mol L-1 s-1
(c) L2 mol-2 s-1
(d) L mol-1 s-1
Answer: (b) mol L-1 s-1
6. In the reaction 2A + B → A2B, if the concentration of A is doubled and that of B is halved, then the rate of the reaction will
(a) Increase 2 times
(b) Increase 4 times
(c) Decrease 2 times
(d) Remain the same
Answer: (a) increase 2 times
7. What will be the order of the reaction if, the rate of the reaction is equal to the rate constant,
(a) Zero order
(b) First order
(c) Second order
(d) Third order
Answer: (a) zero order
8. The catalyst use in the Haber process is
(a) Platinized asbestos
(b) Iron with molybdenum as a promoter
(c) Copper oxide
(d) Alumina
Answer: (b) Iron with molybdenum as a promoter
9. A catalyst alters,
(a) Entropy
(b) Enthalpy
(c) Internal energy
(d) Activation energy
Answer: (d) Activation energy
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