JEE MAIN - Chemistry (2020 - 4th September Evening Slot - No. 3)

The process that is NOT endothermic in nature is :
Ar(g) + e- $$ \to $$ Ar-(g)
H(g) + e- $$ \to $$ H-(g)
Na(g) $$ \to $$ Na+(g) + e-
O-(g) + e- $$ \to $$ O2-(g)

Explanation

H(g) + e- $$ \to $$ H-(g) is exothermic

rest of all endothermic process.

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