Question

Which among the following is an example of pseudo first order reaction?

पर्याय

• \[\ce{2N2O5_{(g)} -> 4NO2_{(g)} + O2_{(g)}}\]

• \[\begin{array}{cc}
  \ce{CH2}\phantom{........................}\\
  \phantom{}/\phantom{....}\backslash\phantom{.........................}\\
  \ce{CH2 - CH2 -> CH3 - CH = CH2}
  \end{array}\]

• \[\ce{H2O2_{(l)} -> 2H2O_{(l)} + O2_{(g)}}\]

• \[\ce{CH3COOCH3_{(aq.)} + H2O_{(l)} -> CH3COOH_{(aq.)} + CH3OH_{(aq.)}}\]

Answer 1

\[\ce{CH3COOCH3_{(aq.)} + H2O_{(l)} -> CH3COOH_{(aq.)} + CH3OH_{(aq.)}}\]

Explanation:

Pseudo first order reaction is a second order that is made to behave like a first order reaction in which one of the reactant is present in excess.

Eg. - Ester hydrolysis in which water is taken in excess.

\[\ce{CH3COOCH3_{(aq.)} + H2O_{(l)} -> CH3COOH_{(aq.)} + CH3OH_{(aq.)}}\]