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JEE Main 202226 JulyMorning Shift

Exam: JEE Main
Year: 2022
Date: 26 July
Shift: Morning Shift
Subject: Chemistry
Chapter: s Block Elements

JEE Main 2022 · 26 July · Morning Shift · Chemistry · s Block Elements

Reaction of BeCl _ 2 with LiAlH _ 4 gives : (A) AlCl _ 3 (B) BeH _...

Reaction of ${BeCl}_{2}$ with ${LiAlH}_{4}$ gives :

(A) ${AlCl}_{3}$

(B) ${BeH}_{2}$

(C) $LiH$

(D) $LiCl$

(E) ${BeAlH}_{4}$

Choose the correct answer from options given below

Options

A $\left(A\right), \left(D\right) \text{ and } \left(E\right)$
B $\left(A\right), \left(B\right) \text{ and } \left(D\right)$
C $\left(D\right) \text{ and } \left(E\right)$
D $\left(B\right), \left(C\right) \text{ and } \left(D\right)$

Correct answer

B. $\left(A\right), \left(B\right) \text{ and } \left(D\right)$

Step-by-step solution

All the alkali earth metals, except beryllium combine with hydrogen upon heating to form their hydrides, ${MH}_{2}$ . ${BeH}_{2}$ , however, can be prepared by the reaction of ${BeCl}_{2}$ with ${LiAlH}_{4}$ . .
$2{BeCl}_{2} + {LiAlH}_{4} \to 2{BeH}_{2} + LiCl + {AlCl}_{3}$

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