Which of the following is correct with respect to ionization enethalpy?

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Li > Na > K > Rb > CsIt is because of dominance of size over nuclear charge.

Li < B < Be It is because Be has 1s2 pair of electrons in valence shell.

C < O < NIt is because of 3-unpaired electrons in 2p, that give extra stability to N-atom.

All are correct.

answer is D.

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Detailed Solution

Based on stable electronic configurations and availability of electrons in their valence shell

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