MCQ on Chemical Kinetics for NEET

Analytical chemistry uses reactions for the identification of chemical compounds. The chemical thermodynamics studies the chemical equilibrium as a source of work and heat etc. The kinetics also has its specific approach to the chemical reaction. It studies the chemical transformation as a process that occurs in time according to a certain mechanism with regularities characteristics of this process. The kinetics study in the chemical process is the study of reaction that occurs in time, it rates, a change in the rate with the development of the process.

Also Check: 

1. The rate of a chemical reaction tells us about

  1. the reactants taking part in reaction
  2. the products formed in the reaction
  3. how slow or fast the reaction is taking place
  4. none of the above

Answer: (c)

2. In the rate equation, when the concentration of reactants is unity then rate is equal to

  1. specific rate constant
  2. average rate constant
  3. instantaneous rate constant
  4. None of the above

Answer: (a)

3. The average rate and instantaneous rate of a reaction are equal

  1. at the start
  2. at the end
  3. in the middle
  4. when two rate have time interval equal to zero

Answer: (d)

4. What of the following observations is incorrect about the order of a reaction?

  1. Order can only be assessed experimentally
  2. The stoichiometric coefficient of the reactants doesn’t affect order.
  3. Order of reaction is the sum of power to express the rate of reaction to the concentration terms of the reactants.
  4. The cumulative number is also the order of reaction.

Answer: (d)

5. There are constant units of first and zero order reactions in terms of M units of molarity.

  1. sec-1, Msec-1
  2. sec-1, M
  3. Msec-1, sec-1
  4. M, sec-1

Answer: (a)

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

  1. increase 2 times
  2. increase 4 times
  3. decrease 2 times
  4. remain the same

Answer: (a)

7. The reactant Vs time concentration diagram for a reaction is a straight line with a negative pendulum. The reaction follows an equation for the intensity.

  1. zero order
  2. first order
  3. second order
  4. third order

Answer: (a)

8. A substance ‘A’ decomposes by a first order reaction starting initially with [A] = 2.00M and after 200min, [A] becomes 0.15M. For this reaction t1/2 is

  1. 53.72 min
  2. 50.49 min
  3. 48.45 min
  4. 46.45 min

Answer: (a)

9. In the Haber process for the manufacture of ammonia the following catalyst is used

  1. Platinized asbestos
  2. Iron with molybdenum as promoter
  3. Copper oxide
  4. Alumina

Answer: (b)

10. In a reversible reaction the energy of activation of the forward reaction is 50 kcal. The energy of activation for the reverse reaction will be

  1. < 50 kcal
  2. either greater than or less than 50 kcal
  3. = 50 kcal
  4. > 50 kcal

Answer: (b)

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