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Q.

statement I : IP1 of Sb > IP1 of Testatement II : Electron gain enthalpy of Nitrogen is positive

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a

Both (I) & (II) are True

b

(I) is true & (II) is false

c

(I) is false & (II) is True

d

Both (I) & (II) are false

answer is C.

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Detailed Solution

IP1 of 'N' > IP1 of 'O'IP1 of 'P' > IP1 of 'S'IP1 of 'As' > IP1 of 'Se'But,IP1 of 'Sb' < IP1 of 'Te'IP1 of 'Bi' < IP1 of 'Po'Due to the stable configuration of Nitrogen,It repels the added e- and thus absorbs energyN(g)+e- →N-(g) ;  ∆H=+ve(I) is false, (II) is true
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statement I : IP1 of Sb > IP1 of Testatement II : Electron gain enthalpy of Nitrogen is positive