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JEE Main 202227 JuneMorning Shift

Exam: JEE Main
Year: 2022
Date: 27 June
Shift: Morning Shift
Subject: Chemistry
Chapter: s Block Elements

JEE Main 2022 · 27 June · Morning Shift · Chemistry · s Block Elements

BeCl _ 2 reacts with LiAlH _ 4 to give

{BeCl}_{2}

reacts with

{LiAlH}_{4}

to give

Options

A $Be + Li\left[{AlCl}_{4}\right] + {H}_{2}$
B $Be + {AlH}_{3} + LiCl + HCl$
C ${BeH}_{2} + LiCl + {AlCl}_{3}$
D ${BeH}_{2} + Li\left[{AlCl}_{4}\right]$

Correct answer

C. ${BeH}_{2} + LiCl + {AlCl}_{3}$

Step-by-step solution

All the elements 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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