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Which of the following sulphides is yell...

Which of the following sulphides is yellow in colour?

A

Zinc sulphide

B

Cadmium sulphide

C

Nickel sulphide

D

Lead sulphide

Text Solution

Verified by Experts

The correct Answer is:
B
Cadmium is second group metal. Addition of ammonium hydroxide in presence of `H_(2)S` gives a yellow ppt.
`CdX_(2) + 4NH_(4)OH to underset("(Colourless)")([Cd(NH_(3))_(4)])X_(2) + 4H_(2)O`
`[Cd(NH_(3))_(4)]X_(2) + H_(2)S to underset("(Yellow)")(CdS) + 2NH_(4)X + 2NH_(3)`
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