Question

Which of the following statement is incorrect for biomolecular nucleophilic substitution reaction `(S_(N^(2))`
A. It is a second order reaction
B. In `S_(N^(2))` reaction the substrate does not undergo heterolytic fission
C. The rate of `S_(N^(2))` reaction does not depends on concentration of both substrate and nucleophilic reagent
D. `S_(N^(2))` reaction occurs in single step without forming intermediate

Answer 1

Correct Answer - C
In `S_(N^(2))`
Rate of reaction depends upon the concentration of both substrate and reagent.
Hence order of reaction = 2, and it is biomolecular nucleophilic addition reaction.
`underset("Substrate")(CH_(3))-Cl+aq.underset("Reagent")(KOH) rarr CH_(3)-Cl+K^(+)+Cl^(-)`