Question

# Which ionic hydride is stable upto its melting point?

A
NaH
B
CaH2
C
LiH
D
BaH2

Solution

## The correct option is C $$LiH$$All ionic hydrides of group $$I$$ and group $$II$$ decompose before their melting point except $$LiH$$.$$LiH$$ is stable upto its melting point.The ionic character of the bonds in hydrides increases from $$LiH$$ to $$CsH$$ and their stability decreases in the same order.Chemistry

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