Q.
The rate of the reaction,
is influenced by the hyper conjugation effect of group R. If R sequentially is
I. $CH_{3} -$
$II$. $CH_{3} - CH_{2} -$
III.$H_{3}C - CH -$
|
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ CH_{3}$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ CH_{3}$
|
IV. $H_{3}C - C -$
|
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ CH_{3}$
the increasing order of speed of the above reaction is
A) IV, III, II, I
B) I, II, III, IV
C) I, IV, III, II
D) III, II, I, IV
Explanation
(a)
The rate of reaction is influenced by the hyperconjugation effect of group R. it depends on the electron donating power of alkyl group (R). The electron releasing power of R group depends on the number of hydrogen present on $\alpha$ carbon. The increasing order of speed with R group in the reaction is
[image:12_image465.emf]
i.e., IV<III<II<I
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.