Question

13.
A blue coloured solution is contained in a beaker. In this solution some pieces of aluminium metal are
placed. After sometime a reddish brown deposit is seen on the aluminium metal. The solution could
be of a salt of
​

Answer 1

Answer:

copper..... ........

Answer 2

Copper is the correct answer.

• The salt solution of copper sulphate reacts with aluminium metal. The reaction yields colourless solution along with reddish brown deposit.
• The reaction states that aluminium is more reactive than copper.
• Copper sulphate solution is blue in colour.
• Aluminium is white in colour.
• The reddish brown deposits over aluminium metal are of copper.
• The reaction is as follows -

2Al + 3CuSo4 --> 3Cu + Al2(SO4)3.