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The order of ionic conductance of alkali...

The order of ionic conductance of alkali metal ions in their aqueous solution in a given concentration is

A

`Li^(+)ltNa^(+)ltK^(+)ltRb^(+)`

B

`Li^(+)gtNa^(+)gtK^(+)gtRb^(+)`

C

`Li^(+)ltNa^(+)gtK^(+)gtRb^(+)`

D

`Li^(+)=Na^(+)ltK^(+)ltRb^(+)`

Text Solution

Verified by Experts

The correct Answer is:
A
Due to extensive hydration of smaller alkali metal cations, the ionic radii is in the order
`Li^(+)gtNa^(+)gtK^(+)gtRb^(+)`
As such mobility in water is in the order
`Li^(+)ltNa^(+)ltK^(+)ltRb^(+)`
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