Question

Select the incorrect statement(s).

• A. $S_N1$ reactions also take place with some elimination
• B. $S_N2$ reactions with chiral compounds give racemic mixture
• C. $S_N1$ reaction is faster in more polar solvents
• D. 1 and 3 are incorrect statements

Answer 1

Answer: (B), (D)

4

Answer 2

Statement 1 is correct: $S_N1$ reactions can compete with E1 reactions, especially when $\beta$-hydrogens are present. Statement 2 is incorrect: $S_N2$ reactions with chiral compounds proceed with inversion of configuration, not racemization. Racemization occurs in $S_N1$ reactions due to the planar carbocation intermediate. Statement 3 is correct: $S_N1$ reactions involve charged intermediates, which are better stabilized by polar solvents, thus increasing the reaction rate. Statement 4 claims that statements 1 and 3 are incorrect. Since both statements 1 and 3 are correct, statement 4 is an incorrect statement. The question asks to select the incorrect statement(s). Both statement 2 and statement 4 are incorrect statements. In the context of multiple-choice questions where a meta-statement like option 4 is present, if option 4 is the intended answer, it means the question is asking to select the option that is an incorrect statement. Since statement 4 itself is an incorrect assertion about statements 1 and 3, it is the correct choice if the question is interpreted this way.