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The stability of the following alkali me...

The stability of the following alkali metal chlorides follows the order:

A

`LiClgtKClgtNaClgtCsCl`

B

`CsClgtKClgtNaClgtLiCl`

C

`NaClgtKClgtLiClgtCsCl`

D

`KClgtCsClgtNaClgtLiCl`

Text Solution

Verified by Experts

The correct Answer is:
d
Stability of a compound epednds upon its enthalpy of formation `DeltaH_(f)`. The more negative value of `DeltaH_(f)` shows more stability of a compound.
Thus, KCl is more stable and LiCl is least stable,
`DeltaH_(f)` for `LiCl=-408.8kJ "mol"^(-1)`
`DeltaH_(f) "for" NaCl=412.5 kJ "mol"^(-1)`
`DeltaH_(f) "for" CsCl=-433 kJ "mol"^(-1)`
`DeltaH_(f) "for" KCl=-436 kJ "mol"^(-1)`
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