Question

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

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

Answer 1

Answer: (B)

Correct answer is (b) $Cd^{2+}$ and $Sb^{3+}$