Which of the following statements regarding adsorption theory of heterogeneous catalysis is not correct?

  • A
    The reactant molecules get adsorbed on the surface of the catalyst.
  • B
    The chemical reaction occurs at the surface of the catalyst.
  • C
    The product molecules remain permanently bound to the catalyst surface.
  • D
    The catalyst remains unchanged in mass and chemical composition at the end of the reaction.

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Catalysts in the following reactions are:
$(I) CH_3COOCH_{3(l)} + H_2O_{(l)} \rightarrow CH_3COOH_{(aq)} + CH_3OH_{(l)}$
$(II) 2SO_{2(g)} + O_{2(g)} \rightarrow 2SO_{3(g)}$ (Contact Process)
$(III) 2SO_{2(g)} + O_{2(g)} \rightarrow 2SO_{3(g)}$ (Lead Chamber Process)
$(IV) N_{2(g)} + 3H_{2(g)} \rightarrow 2NH_{3(g)}$ (Haber Process)

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Which of the following is true about a catalyst?

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