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Q.

When the first electron gain enthalpy ∆eqH of oxygen is -141 kJ/mol. its second Electron gain enthalpy is

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a

Almost the same as that of the first

b

Negative. but less negtiave than the first

c

A positive value

d

A more negative value than the first

answer is C.

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Detailed Solution

Second electron gain enthalpy is always positive for every element.  O(g)−+e→O(g)−2; ΔH= positive.
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