Question

In the reaction $2N{O}_{\left(g\right)}+2H_{2_{\left(g\right)}}\to N_{2_{\left(g\right)}}+2H_{2}O$, if initial concentration of hydrogen is kept constant and the concentration of NO is doubled, the rate of reaction increases by 4 times. This shows that rate is directly proportional to _________.

• A. catalyst
• B. concentration of nitric oxide
• C. concentration of Hydrogen
• D. concentration of water

Answer 1

The correct option is B concentration of nitric oxide

It is given that for the reaction, $2N{O}_{\left(g\right)}+2H_{2_{\left(g\right)}}\to N_{2_{\left(g\right)}}+2H_{2}O$, if the initial concentration of hydrogen is kept constant and the concentration of $NO$ is doubled, the rate of reaction increases by $4$ times.

This means that the rate is directly proportional to concentration of $NO$ raised to the power of its stoichiometric co-efficient provided the reactant hydrogen concentration is kept constant.