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Question

Which of the following sulphides is/are not yellow in color?

A
CuS
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B
CdS
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C
ZnS
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D
CoS
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Solution

The correct options are
A CuS
B CoS
C ZnS
A) CuS:Dark indigo blue colour
B) CdS: yellow colour
C) ZnS: Black colour
D) CoS: Black colour.
Hence options A,C & D are correct.

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