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The decreasing order of second ionisatio...

The decreasing order of second ionisation potential of K, Ca and Ba is:

A

`K gt Ca gt Ba`

B

`Ca gt Ba gt K`

C

`Ba gt K gt Ca`

D

`K gt Ba gt Ca`

Text Solution

Verified by Experts

The correct Answer is:
A
`K^+` has outer `3s^2 , 3p^6` configuration, Ba is lower than Ca in the group.
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