First slide

Hydrogen

Question

The correct stability order of ionic hydride is

Moderate

A

LiH > NaH > KH > RbH
B

RbH > KH > NaH > LiH
C

${BaH}_{2} > {SrH}_{2} > {CaH}_{2}$
D

None of these

Solution

Stability order of ionic hydride is
LiH > NaH > KH > RbH
ionic Hydrides are colourless and crystal
Reason : Size of cation $↑$
& LE decreases stability $↓$
$[LE . \propto \frac{1}{r}]$

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