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Q.

The group of elements with highest second ionisation energy is

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a

IIA group

b

Zero group

c

VIIA group

d

IA group

answer is D.

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Detailed Solution

IA group elements have highest second ionization energy.

IA group = Li, Ba, K, Rb, Cs

=Li=1s22s1

After remove the one electron it gets inert gas configuration, In inert gas to remove the electron more amount of energy is required. 

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