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Assertion (A): A catalyst cannot shift the position of a chemical equilibrium.
Reason (R): It lowers the barrier in both the forward and the reverse direction equally.

  • A.A is false but R is true
  • B.Both A and R are true, and R is the correct explanation of A
  • C.Both A and R are true, but R is not the correct explanation of A
  • D.A is true but R is false

Answer: B

Both are true and the reason gives the argument: the ratio of the two rate constants is unchanged, and that ratio is exactly the equilibrium constant. Both directions are accelerated equally. Only the approach to equilibrium is hastened.

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