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A compound is yellow when hot and white ...

A compound is yellow when hot and white when cold. The compound is:

A

`Al_(2)O_(3)`

B

`PbO`

C

`CaO`

D

`ZnO`

Text Solution

Verified by Experts

The correct Answer is:
D
It is a white powder which becomes yellow on heating due to change in the structure of lattice (due to cation excess defect) but again turns white on cooling.
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RESONANCE-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Additional Problems for Self practice (APSP)
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