Question

Choose the correct statement.

• A. The plot of \( [A] \) versus time \( t \) for a zero order reaction is a horizontal line parallel to the x-axis which represents \( t \).
• B. For a first order reaction the time taken for \( \frac{3}{4}^{\text{th}} \) completion is 2 times the half-life period.
• C. For a second order reaction the rate of reaction with respect to reactant becomes 27 times when its concentration is tripled.
• D. Molecularity of a chemical reaction is always greater than order of the reaction.

Hint:

For first order reactions, time for 75% completion is always \( 2t_{1/2} \). Also remember graph shapes for zero, first and second order reactions.

Answer 1

The Correct Option is B