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Which of the following statements is not correct ?

$\begin {array} {1 1} (A)\;\text{ZnO is a white powder and its colour changes to yellow on heating and becomes again white on cooling} \\ (B)\;\text{ZnO is an amphoteric oxide} \\ (C)\;\text{ZnO is used as a white pigment in paints} \\ (D)\; \text{Zno is a non-toxic compound and is blackened by atmospheric hydrogen sulphide} \end {array}$

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Answer : Zno is a non-toxic compound and is blackened by atmospheric hydrogen sulphide
Zno is a non-toxic and is not blackened by atmospheric hydrogen sulphide.
answered Aug 1, 2014 by thanvigandhi_1
 

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