A) \[ZnS\]
B) \[ZnO\]
C) \[ZnC{{l}_{2}}\]
D) \[ZnS{{O}_{4}}\]
Correct Answer: B
Solution :
Zinc oxide is white powder, becomes yellow on heating and again white on cooling. \[\underset{white}{\mathop{ZnO(s)}}\,\xrightarrow{\Delta }\underset{yellow}{\mathop{ZnO(s)}}\,\]
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