An alcohol X left( C_5 H_{12} O right) produc | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) $1$. The Lucas test (conc. $HCl / ZnCl_2$) is used to distinguish between primary,secondary,and tertiary alcohols. Tertiary alcohols react instant

Vedclass · Accepted Answer

$3-$methylbutan$-1-$ol,$2$-methylbutan$-2-$ol

Vedclass · Answer

(D) $1$. The Lucas test (conc. $HCl / ZnCl_2$) is used to distinguish between primary,secondary,and tertiary alcohols. Tertiary alcohols react instantly to produce turbidity.$2$. Alcohol $X$ produces turbidity instantly,meaning it must be a tertiary alcohol. Among the isomers of $C_5 H_{12} O$,$2$-methylbutan-$2$-ol is a tertiary alcohol.$3$. Alcohol $Y$ undergoes dehydration with conc. $H_2 SO_4$ at $443 \ K$. This is a characteristic reaction for alcohols to form alkenes.$4$. Comparing the options,$2$-methylbutan-$2$-ol is the tertiary alcohol $(X)$ and $3$-methylbutan-$1$-ol is a primary isomer $(Y)$.$5$. Therefore,the correct pair is $X = 2$-methylbutan-$2$-ol and $Y = 3$-methylbutan-$1$-ol,which corresponds to option $D$.

Column-$I$ (Reaction)	Column-$II$ (Mechanism)
$A$. $CH_3OCH_2CH_3 + HI \to CH_3I + CH_3CH_2OH$	$i$. $S_{E}2$ Aromatic
$B$. $(CH_3)_3COCH_3 + HI \to CH_3OH + (CH_3)_3CI$	$ii$. $S_{N}1$
$C$. $C_6H_5OCH_3 + Br_2(CH_3COOH) \to p$-Bromoanisole	$iii$. Elimination $(\beta)$
$D$. $CH_3CH_2OH + H_2SO_4 (443 \ K) \to CH_2=CH_2$	$iv$. $S_{N}2$

An alcohol $X \left( C_5 H_{12} O \right)$ produces turbidity instantly with conc. $HCl / ZnCl_2$. Isomer $(Y)$ of $X$ undergoes dehydration with conc. $H_2 SO_4$ at $443 \ K$. $X$ and $Y$ respectively are

Similar Questions

Identify $B$ and $D$ in the following sequence of reactions.

Arrange the following sets of compounds in order of their increasing boiling points:
$(a)$ Pentan$-1-$ol,butan$-1-$ol,butan$-2-$ol,ethanol,propan$-1-$ol,methanol.
$(b)$ Pentan$-1-$ol,$n-$butane,pentanal,ethoxyethane.

What is $Cresol$?

Esterification of the acid $P$ with the alcohol $Q$ will give:

Vedclass Test Series

Exam Paper Generator

Online Exam Module