Question

2M + H2 → 2MH, the element 'M' is group IA metal. Then following is decreasing order of thermal stabilities of these hydrides
(A) CsH > RbH > KH > NaH > LiH
(B)
NaH > LiH > KH > RbH > CSH
(C) KH > CsH > NaH > RbH > LiH
(D) LIH> NaH > KH > RbH > CsH​

Answer 1

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Corect options is B