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The alkali metals font salt likelydrides...

The alkali metals font salt likelydrides by direct synthesis at elevated temperatures. The thermal stability of these hydrides decreases in which of the following onders?

A

`NaH gt LiH gt KH gt RbH gt Cs H`

B

`LiH gt NaH gt KH gt RbH gt CsH`

C

`CaH gt RbH gt KH gt NaH gt LiH`

D

`KH gt NaH gt LiH gt CaH gt RbH`

Text Solution

Verified by Experts

The correct Answer is:
B
As bond length increases bond energy decreases their by thermal stability decreases down the group.
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