Q5 / 180 · KCET 2007 · Chemistry

Which one of the following is a second order reaction?

  • A
    $\mathrm{H}_{2}+\mathrm{Br}_{2} \longrightarrow 2 \mathrm{HBr}$
  • B
    $\mathrm{NH}_{4} \mathrm{NO}_{3} \longrightarrow \mathrm{N}_{2}+3 \mathrm{H}_{2} \mathrm{O}$
  • C
    $\mathrm{H}_{2}+\mathrm{Cl}_{2} \stackrel{\text { sumlight }}{\longrightarrow} 2 \mathrm{HCl}$
  • Correct answer
    D
    $\mathrm{CH}_{3} \mathrm{COOCH}_{3}+\mathrm{NaOH}$ $\longrightarrow \mathrm{CH}_{3} \mathrm{COONa}+\mathrm{H}_{2} \mathrm{O}$

Solution

The reaction is said to be of second order if its reaction rate is determined by the variation of two concentration terms of reactants $$ \mathrm{CH}_{3} \mathrm{COOCH}_{3}+\mathrm{NaOH} \longrightarrow \mathrm{CH}_{3} \mathrm{COONa}+\mathrm{H}_{2} \mathrm{O} $$ is an example of second order reaction.

Hence, the correct answer is option: 'D'.

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