The rate constant of the reaction, \( 2N_2O_5 \rightarrow 4NO_2 + O_2 \) at 300 K is \( 3 \times 10^{-5} \) s\(^{-1}\). If the rate of the reaction is \( 2.4 \times 10^{-5} \) mol dm\(^{-3}\) s\(^{-1}\), then the molar concentration of \( N_2O_5 \) is

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 of the reaction, \( 2N_2O_5 \rightarrow 4NO_2 + O_2 \) at 300 K is \( 3 \times 10^{-5} \) s\(^{-1}\). If the rate of the reaction is \( 2.4 \times 10^{-5} \) mol dm\(^{-3}\) s\(^{-1}\), then the molar concentration of \( N_2O_5 \) is

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The Correct Option is B

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