NEET UG CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Application +4 | -1

E A_1

and

E A_2

for oxygen atom

-142 \mathrm{~kJ ~mol}^{-1}

and

+844 \mathrm{~kJ ~mol}^{-1}

. The energy released from

2 O+2 e^{-} \rightarrow 2 O^{-}

will be

View answer and explanation

Correct option: C

-284 \mathrm{~kJ ~mol}^{-1}

Option C (-284 kJ/mol) is correct because it correctly sums the electron affinities for the two oxygen atoms.

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