Which one of the following statements is correct-

Options

A. in homogeneous catalysis , the catalyst and the reactant always exist in the gaseous state
B. in heterogeneous catalysis, reactant molecules remain adsorbed on the surface of the catalyst by physisorption
C. in heterogeneous catalysis, reactant molecules should be strongly adsorbed on the surface of the adsorbent
D. in heterogeneous catalysis, the reactant molecules should not be too weakly adsorbed on the surface of the adsorbent

Answer

D