Chemical Kinetics Sample Questions for Class 12
Question 1
Consider the following chemical equation for a decomposition reaction:H_2O_2 (aq) rarr H_2O(l) + (1/2)O_2(g)This represents what type of reaction in kinetics?
A. Unimolecular reaction
B. Bimolecular reaction
C. Trimolecular reaction
D. Tetramolecular reaction
Question 2
The rate of reaction depends on the surface area of a catalyst in
A. homogeneous catalysis.
B. enzyme catalysis.
C. acid catalysis.
D. heterogeneous catalysis.
Question 3
These catalyze reactions by lowering the activation energy:
A. Proteins
B. Enzymes
C. Carbohydrates
D. Steroids
Question 4
Enzymes work by the activation energy needed to start a chemical reaction.
A. lowering
B. increasing
C. stabilizing
Question 5
In the reaction, 2A + B rarr A_2B, if the concentration A is doubled and that of B is halved, then the rate of reaction will
A. increase by 4 times.
B. decreases by 2 times.
C. remain the same.
D. increase by 2 times.