Q.

A black sulphide is formed by the action of H2S on

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a

CuCl2

b

CdCl2

c

ZnCl2

d

NaCl

answer is A.

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Detailed Solution

CuCl2+H2S⟶CuS+2HCl                          (Black)
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A black sulphide is formed by the action of H2S on