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Question

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


A

KH > NaH > LiH > CsH > RbH

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B

NaH > LiH > KH > RbH > CsH

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C

LiH > NaH > KH > RbH > CsH

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D

CsH > RbH > KH > NaH > LiH

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