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Question

The maximum 2nd I.E is of _________.

A
Mn
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B
Sc
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C
Cr
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D
Ti
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Solution

The correct option is D Cr
The 2nd IE increases along a period towards right. So it is expected that Mn has highest second IE. However, Cr+ has 3d5 configuration, which gives it added stability hence its IE increases and thus highest second IE of Cr. Thus answer is option C.

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