Which hydride is commercially known as hydrolith ?

MgH₂

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CaH₂

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NaH

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Solution

The correct option is B
CaH₂

Calcium hydride (philosophers stone) $C a H_{2}$ is commercially known as hydrolith.

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Question 3

Metal hydrides are ionic, covalent or molecular in nature. Among LiH,NaH, KH,RbH,CsH, the correct order of increasing ionic charcter is

(a) LiH > NaH > CsH > KH > RbH

(b) LiH < NaH < KH < RbH < CsH

(d) NaH > CsH > RbH > LiH > KH

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