Question

on placing a piece of aluminium metal in the solution of copper sulphate it acquires a shining surface but when it is placed in a solution of magnesium sulphate no change is observed . explain​

Answer 1

aluminium is more reactive then copper

hence when we put aluminium metal in cuso4

then it displaces copper

and form aluminium sulphate and

cupper is place on aluminium metal which shine

2)aluminium cant replace magnesim because aluminium is less reactive than magnessium hence no chance is observed

Answer 2

aluminium is more reactive than copper so it displaces copper from its salt solution.

But in second case , mg is more reactive than aluminium so aluminium can't displace mg from its salt sol.

REACTIVITY DECREASES:

Mg>Al>Cu