Chemical Kinetics

Chemical Kinetics

Question

Higher order (>3) reactions are rare due to:

  • the increase in entropy and activation energy as more molecules are involved.

  • shifting of equilibrium towards reactants due to elastic collisions

  • loss of active species on a collision

  • low probability of simultaneous collision of all the reacting species

Answer

A.

the increase in entropy and activation energy as more molecules are involved.

Conditions for the occurrence of a reaction:
(i)  Proper orientation and effective collision of the reactants.
(ii)  the chances of simultaneous collision with proper orientation between more than 3 species are very rare, so reaction with order greater than 3 are rare.

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