Question

Match one substance from (a) to (e) listed below with the appropriate description.
A compound which is insoluble in cold water but soluble in excess of ammonia solution.

• A. Sulphur
• B. Silver chloride
• C. Hydrogen chloride
• D. Copper (II) sulphate
• E. Graphite

Answer 1

The correct option is B

Silver chloride

Explanation for correct option:

• Ammonium hydroxide $\left({\mathrm{NH}}_4\mathrm{OH}\right)$ reacts with silver chloride$\left(\mathrm{AgCl}\right)$ to produce diamine, silver chloride, and water. Silver chloride is insoluble in cold water but soluble in excess of ammonia solution.
• $\mathrm{AgCl}\left(\mathrm{aq}\right)+2{\mathrm{NH}}_4\mathrm{OH}\left(\mathrm{aq}\right)\to \left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]\left(\mathrm{aq}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$

Therefore, option (b) is correct.