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Q.

Atoms of the following group possess the highest ionisation energies

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a

IIA

b

VA

c

Zero

d

IA

answer is D.

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Detailed Solution

Zero group (or) Inert gas (or) VIIIA group elements with ${ns}^{2} {np}^{6}$ type of electronic configuration are more stable these posses highest ionization energy.

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Atoms of the following group possess the highest ionisation energies