Q5 / 200 · WBJEE 2013 · Chemistry

Acid catalysed hydrolysis of ethyl acetate follows a pseudo-first order kinetics with respect to ester. If the reaction is carried out with large excess of ester, the order with respect to ester will be

  • A
    1.5
  • Correct answer
    B
    0
  • C
    0.5
  • D
    1

Solution

$\mathrm{CH}_{3} \mathrm{COOC}_{2} \mathrm{H}_{5}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{CH}_{3} \mathrm{COOH}$ $+\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$ If above reaction is carried out with large excess of ester, the rate of reaction does not depend upon cencentration of both the reactants. Due to which, the reaction becomes of zero order.

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

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