Question

Q10. A chloride which is soluble in excess of ammonium hydroxide is

• A. Calcium chloride
• B. Ferrous chloride
• C. Ferric chloride
• D. Copper chloride

Answer 1

The correct option is D

Copper chloride

Explanation for correct option:

(D) Copper chloride:

• The reaction of Copper chloride${\mathrm{CuCl}}_2$ in excess of ammonium hydroxide ${\mathrm{NH}}_4\mathrm{OH}$ :

$\underset{\mathrm{Copper}\mathrm{chloride}}{{\mathrm{CuCl}}_2\left(\mathrm{s}\right)}+\underset{excess\mathit{}ammoniumhydroxide}{\mathit{4}N{H}_{4}OH\mathit{\left(}l\mathit{\right)}}\to 2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+\underset{\mathrm{tetraamine}\mathrm{copper}\mathrm{chloride}}{\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_4\right]{\mathrm{Cl}}_2}+2\mathrm{HCl}$

Explanation for incorrect options:

(A) Calcium chloride is not soluble in excess of ammonium hydroxide.

(B) Ferrous chloride is also insoluble as no soluble product is formed.

(C) Ferric chloride does not dissolve or is soluble in ammonium hydroxide.

Copper chloride is soluble in excess of ammonium hydroxide. Thus option D is correct.