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Q.

Which is correct about ionisation potential?

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a

IE1 of N>IE1 of O

b

IE2 of N>IE2 of O

c

IE2 of Li>IE2 of Ne

d

IE1 of Al>IE1 of Ca

answer is A.

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Detailed Solution

(1) True. IE1 of N>IE1 of O, due to half-filled configuration in N.(2) False. N2s22p3 (More stable)  High IE1⟶N⊕2s22p2 (Less stable) −e−Low IE2⟶N2+2s12p1O2s22p4 (Less stable) ⟶ (Low IE1O⊕2s22p3(Morestable)−e−High IE2→O2+2s22p2 Hence, IE2 of O>IE2 of N.
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