If the $I P$ of $N a$ is $5.48 e V$ , the ionisation potential of $K$ will be :

Same as that of

N a

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4.34 e V

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5.68 e V

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10.88 e V

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Solution

The correct option is A $4.34 e V$
Ionisation potential decreases down the group so ionisation potential of $K$ is lesser than that of $N a$

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