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The decreasing order of the second ionis...

The decreasing order of the second ionisation potential of K , Ca and Ba is
(At. No : K = 19 , Ca = 20 , Ba = 56)

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
is the correct answer. `Delta iH_(2)` of K is the maximum because `K^(+)` has noble gas configuration. `Delta iH_(2)` of Ca is more than that of Ba because down the group.
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