Question

In which the colour change
1) zinc pieces are placed in Al2SO4
2)Zinc pieces are placed in FeSO4

Answer 1

$\huge\mathtt{Answer:-}$

(1)Zn is less reactive that Al. It does not displace Al from Al2SO4 to form ZnSO4.

Hence,there is no colour change.

(2)Zn is more reactive than Fe.It displaces Fe from FeSO4 solution and forms ZnSO4.

It turns colourless.

Reaction involved:-

$\huge\boxed{Zn+FeSO4------>ZnSO4+Fe}$