Which of the following in an energy cons...

Which of the following in an energy consuming process ?

A

`O(g) +e^(-) to O^(-) (g) `

B

`Na^(+) (g) + e^(-) to Na(g) `

C

`O^(-) (g) +e^(-) to O^(2-) (g) `

D

`O^(2-) (g) to O^(-) (g) +e^(-)`

Verified by Experts

The correct Answer is:

C

it refers to second electron affinity which is -ve.

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