Alkyl Halides - Result Question 26
####26. Identify the set of reagents/reaction conditions $X$ and $Y$ in the following set of transformations-
$(2002,3 M)$
$CH _3-CH _2-CH _2 Br \xrightarrow{X}$ Product $\xrightarrow{Y} CH _3-\underset{Br}{CH}-CH _3$
(a) $X$ dilute aqueous $NaOH, 20^{\circ} C, Y=HBr$ /acetic acid, $20^{\circ} C$
(b) $X=$ concentrated alcoholic $NaOH, 80^{\circ} C$,
$Y=HBr$ /acetic acid, $20^{\circ} C$
(c) $X=$ dilute aqueous $NaOH, 20^{\circ} C, Y=Br _2 / CHCl _3, 0^{\circ} C$
(d) $X=$ concentrated aqueous $NaOH, 80^{\circ} C$,
$Y=Br _2 / CHCl _3, 0^{\circ} C$
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Answer:
Correct Answer: 26. (b)
Solution:
- $CH _3-CH _2-CH _2 Br$
$\xrightarrow[80^{\circ} C]{\text { Alcoholic } NaOH} CH _3-CH=CH _2$
