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)

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 from the options given below :

(A) (A) is false but (R) is true.
(B) Both (A) and (R) are true and (R) is the correct explanation of (A).
(C) (A) is true but (R) is false.
(D) Both (A) and (R) are true and (R) is not the correct explanation of (A). uhps nks dFku fn, gSaA ,d dk uke vfHkdFku (A) rFkk nwljs dk dkj.k (R) gSA vfHkdFku (A) : izksihu dh czksehu ty ls vfHkfØ;k 1-czkseksizksisu-2-vkWy nsrh gSA dkj.k (R) : ty dk czkseksfu;e vk;u ij vkØe.k ekdksZuh dkWo fu;e dk vuqlj.k dj ifj.kkeLo:Ik 1-czkseksizksisu-2- vkWy nsrk gSA mijksDr dFkuksa ds lanHkZ esa] lokZf/kd mfpr mÙkj fuEu fodYiksa esa ls pqfu,A (1) (A) lgh ugha gS ijUrq (R) lgh gSA (2) nksuksa (A) rFkk (R) lgh gSa vkSj (R) lgh O;k[;k gS (A) dhA (3) (A) lgh gS ijUrq (R) lgh ugha gSA (4) nksuksa (A) rFkk (R) lgh gSa vkSj (R) lgh O;k[;k ugha gS (A) dhA

Prashant Kotian · Accepted Answer

Correct answer: B. Br2 H2O CH3–CH=CH2 CH3–CH–CH2 OH Br Markovnikov’s rule of addition : In an electrophilic addition reaction to alkenes and alkynes the electrophile attacks in such a way that a more stable carbocation intermediate is formed on which nucleophile attacks in the next step.

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