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The correct stability order of ionic hydride is

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By Expert Faculty of Sri Chaitanya
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a
LiH > NaH > KH > RbH
b
RbH > KH > NaH > LiH
c
BaH2  >  SrH2  > CaH2
d
None of these
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detailed solution

Correct option is A

Stability order of ionic hydride isLiH > NaH > KH > RbHionic Hydrides are colourless and crystalReason : Size of cation ↑& LE decreases stability ↓LE. ∝ 1r

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

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