Question

Given below are two statements: one is labelled as
Assertion (A) and the other is labelled as Reason (R)
Assertion (A) : Treatment of bromine water with propene yields 1- bromopropan -2 - ol
Reason (R) : Attack of water on bromonium ion follows Markovnikov rule and results in 1- bromopropan -2 - ol
In the light of the above statements, choose the most appropriate answer fron the options given below:

• A. (A) is true but (R) is false
• B. Both (A) and (R) are true and (R) is the correct explanation of (A)
• C. (A) is false but (R) is true
• D. Both (A) and (R) are true but (R) is NOT the corect explanation of (A)

Answer 1

The correct option is B Both (A) and (R) are true and (R) is the correct explanation of (A)

Alkene with $B{r}_2$ forms bromonium ion and then water molecules attacks by Markovnikov rule to give the major product.
Markovnikov's rule: Negative part of the addendum (adding molecule) gets attached to that doubly bonded C which posses lesser number of hydrogen atoms.

Here, the water molecule attacks the carbon which posses less number of hydrogen atom because the partial postive charge on this carbon is stabilised by the +I effect of $C{H}_3$ group.


Hence, option (a) is correct.