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AIIMS 201925 May

Exam: AIIMS
Year: 2019
Date: 25 May
Subject: Chemistry
Chapter: Practical Chemistry

AIIMS 2019 · 25 May · Chemistry · Practical Chemistry

Sulphides of which of the following metal ions do not form black...

Sulphides of which of the following metal ions do not form black precipitate?

Options

A $\mathrm{Hg}^{2+}$ and $\mathrm{Co}^{2+}$
B $\mathrm{Cd}^{2+}$ and $\mathrm{Sb}^{3+}$
C $\mathrm{Ni}^{2+}$ and $\mathrm{Ag}^{+}$
D $\mathrm{Co}^{2+}$ and $\mathrm{Cu}^{2+}$

Correct answer

B. $\mathrm{Cd}^{2+}$ and $\mathrm{Sb}^{3+}$

Step-by-step solution

\mathrm{CdS} \rightarrow

yellow ;

\mathrm{Sb}_2 \mathrm{~S}_3 \rightarrow

orange

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