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Zinc oxide loses oxygen on heating accor...

Zinc oxide loses oxygen on heating according to the reaction, `ZnO overset"heat"to Zn^(2+) + 1/2O_2+ 2e^(-)`
It becomes yellow on heating because

A

Zn being a transition element

B

paramagnetic nature of the compound

C

trapping of electrons at the site vacated by oxide ions

D

Both (A) & (B)

Text Solution

Verified by Experts

The correct Answer is:
C
Some of `O^(2-)` combine with each other forming `O_(2)` gas which is liberated leaving behind electrons at the site vacated by oxide ions
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