Question

rohit took four test tubes containing solution of zinc sulphate, aluminum sulphate, copper sulphate and iron sulphate. he immersed an iron nail in each of the test tubes. after some time he observed that one of the nail immersed in the test tube had a reddish brown coating.

in which of the solution was this change and why ❓​

Answer 1

Answer:

More reactive metal displaces less reactive metal from its salt solution .

Zinc metal displaces copper from copper sulphate .

1. Zinc(Zn) + Copper sulphate (Cu SO 4 )Zinc sulphate (Zn SO 4 ) + Copper(Cu)

(Metal) (blue coloured ) (Zinc displaces copper) (red)

2. Copper(Cu) +Zinc sulphate (Zn SO 4 )No displacement.

Similarly, Iron metal displaces copper metal from copper sulphate solution because iron is more

reactive than copper.

1. Iron(Fe) + Copper sulphate (Cu SO₄)→Iron sulphate(Fe SO₄) +Copper (Cu)

(Metal) (blue coloured) (greenish solution) (red)

2. Copper(Cu) +Iron sulphate (Fe SO₄)→ No displacement.