First slide
Hydrogen
Question

Which of the following hydrogen compounds is most ionic ?

Easy
Solution

IA group metal hydrrides are [ionic in nature] called ionic hydrides, Those are
 

\large Ionic\;character:\;\xrightarrow{{LiH\; < \;NaH\; < \;KH\; < \;RbH\; < \;CsH}}


As the metallic nature of central metal increases ionic nature of hydride increases
Therefore easy of ionisation of M-H bond increases and hence most ionic is CsH
→ Whereas HF,HCl,HBr, HI are covalent hydrides.

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