NEET Chemistry The S Block Elements Online Test Set C

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Question 1

Question

The alkali metals from salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders ?

Answer
LiH > NaH > KH > RbH > CsH
CsH > RbH > KH > NaH > LiH
KH > NaH > LiH > CsH > RbH
NaH > LiH > KH > RbH > CsH