Question

A white solid is soluble in hot water but almost insoluble in cold water. When potassium chromate is added to its hot solution a yellow precipitate is obtained. The original solid is:

• A. silver chloride
• B. potassium nitrate
• C. lead chloride
• D. barium sulphate

Answer 1

The correct option is C lead chloride

Lead chloride is a white solid is soluble in hot water but almost insoluble in cold water.

Lead chloride reacts with potassium chromate to form Lead chromate and potassium chloride. potassium chromate is a yellow color precipitate.

$PbC{l}_2+K_{2}Cr{O}_4\to PbCr{O}_4+KCl$