Select the correct statement

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O(g)⟶O2−(g) is exothermic step.

Mg2+(g)⟶Mg(g) is endothermic step.

N(g)⟶N−(g) is endothermic step.

Fe2+(g)⟶Fe3+(g) is exothermic step.

answer is C.

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Detailed Solution

O(g)⟶O2−(g) ΔH=+ ve Mg2+(g)⟶Mg(g) ΔH=− ve N(g)⟶N−(g) ΔH=+ ve Fe2+(g)⟶Fe3+(g) ΔH=+ ve

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