The rate constant for a zero order reaction \( A \rightarrow B + C \) is \( 6.0 \times 10^{-3} \, \text{mol L}^{-1} \, \text{s}^{-1} \). What would be the time taken for the initial concentration of A to decrease from 0.2 M to 0.024 M?

Question

Following are the four molecules ``P``, ``Q``, ``R`` and ``S``. Which one among the four molecules will react with H-Br(aq) at the fastest rate? Molecules:

\[ P: \text{Cyclic compound with two O groups attached to the ring.} \] \[ Q: \text{Cyclic compound with one O group and one CH\(_3\) group attached to the ring.} \] \[ R: \text{Cyclic compound with one O group attached to the ring and one CH\(_3\) group attached to the ring.} \] \[ S: \text{Cyclic compound with one CH\(_3\) group attached to the ring.} \]

The rate constant for a zero order reaction \( A \rightarrow B + C \) is \( 6.0 \times 10^{-3} \, \text{mol L}^{-1} \, \text{s}^{-1} \). What would be the time taken for the initial concentration of A to decrease from 0.2 M to 0.024 M?

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The Correct Option is D

Solution and Explanation

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