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Question: When \(BeCl_{2}\) is hydrolysed, white fumes of gas are given out. The intensity of fumes intensifie...

When BeCl2BeCl_{2} is hydrolysed, white fumes of gas are given out. The intensity of fumes intensifies when a rod dipped in moist ammonia is brought near the mouth of the testa tube. The gas which comes out during hydrolysis is.

A

Cl2Cl_{2}

B

HCl

C

NH4OHNH_{4}OH

D

NH4ClNH_{4}Cl

Answer

HCl

Explanation

Solution

: BeCl2+2H2O→Be(OH)2+2HCl(fumes)BeCl_{2} + 2H_{2}O \rightarrow Be(OH)_{2} + \underset{(fumes)}{2HCl}

HCl+NH3→NH4Cl(intensefumes)HCl + NH_{3} \rightarrow \underset{\begin{aligned} & ({int}ensefumes) \\ & \end{aligned}}{NH_{4}Cl}