Question

Blue copper sulfate solution become colorless after reacting aluminium because:

• A. copper sulfate losses its color in presence of air
• B. copper aluminium sulfate is formed which is colorless
• C. aluminium displaces copper and forms aluminium sulfate solution which is colorless
• D. none of these

Answer 1

The correct option is C aluminium displaces copper and forms aluminium sulfate solution which is colorless

Aluminium is a reactive metal than copper hence when it reacts with copper sulphate aluminium sulphate is formed which is colourless in nature. Hence the solution losses its colour.
$2Al+3CuS{O}_4\to 3Cu+2Al(S{O}_4{)}_3$