Metal hydrides are ionic, covalent or molecular in nature. Among LiH, NaH, KH, RbH, CsH, the correct order of increasing ionic character is
(i) LiH > NaH > CsH > KH>RbH
(ii) LiH < NaH < KH < RbH < CsH
(iii) RbH > CsH > NaH > KH > LiH
(iv) NaH > CsH > RbH > LiH > KH

 

Answers (1)

The answer is the option (ii) LiH < NaH < KH < RbH < CsH

This happens due to the reason that as the atomic size increases, the ionic; electropositive character of the metal hybrides also increases.

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