Q. Which of the following liberates ammonia when treated with water?

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$Li_{3}N$

$Mg_{3}N_{2}$

$CaCN_{2}$

All of these

Solution:

All these can give ammonia on reaction with water
$Li_{3}N+3HOH \rightarrow NH_{3}+3LiOH$
$Mg_{3}N_{2}+6HOH \rightarrow 2NH_{3}+3Mg\left(\right.OH\left(\left.\right)_{2}$
$CaCN_{2}+3HOH \rightarrow 2NH_{3}+CaCO_{3}$

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