Question

Statement 1: Alkyl halides form alkenes when heated above $300^{o}C.$
Statement 2: $CH_{3}CH_{2}l$ react slowly with strong base when compared to $CD_{3}CH_{2}l$.

• A. If both Statement 1 and Statement 2 are true and the statement 2 is the correct explanation o f the statement 1.
• B. If both Statement 1 and Statement 2 are true but statement 2 is not the correct explanation of the statement 1.
• C. If Statement 1 is true but Statement 2 is false.
• D. If Statement 1 is false but Statement 2 is true.

Answer 1

Answer: (C)

$CH_{3}CH_{2}I$ reacts more rapidly with strong base in comparison to $CD_{3}CH_{2}I$. The elimination of HI (or DI) in presence of strong base shows $E_{2}$ elimination. The rate determining step involves the breaking up of C-H (or C-D) bond. The C-D bond being stronger than C-H and thus elimination is faster in case of $CH_{3}CH_{2}l$.