Q.

Energy is absorbed in all the following processes except

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a

Beg→Be-g

b

Ng→N-g

c

Og→O-g

d

Xeg→Xe-g

answer is C.

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Detailed Solution

The process represents electron gain enthalpy;∆Heg of Be,Mg,N,Nobles gases is positive due to stable configuration;Thus Og→O-g, ∆H=-141 kJ/mole
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