Question

Blue coloured Cuso4 is taken in two test tubes A and B. Zinc granules are added to test tube A and a
small iron pieces are added to test tube B. Explain the observations in each case by giving reasons.​

Answer 1

Answer:

Well in test tube A the the reaction is

Zn+CuSO4 -> ZnSO4+Cu

And in test tube B the reaction is

Fe+CuSO4 -> FeSO4+Cu

Explanation:

So in test tube A Zinc displaces Copper which was in the CuSO4 because zinc is more reactive than copper and gives us ZnSO4.

And also in the test B iron displaces copper which was in CuSO4 because iron is more reactive than copper and gives us FeSO4.

I HOPE IT WILL HELP YOU.

Answer 2

Answer:

Explanation:

When zinc granules are added in blue colored solution (CuSO4) of test tube A, blue color turns to white (ZnSO4) and a reddish brown solid(Cu) settles down in the test tube.

     Reason : Here Zn replaces Cu from CuSO4 since Zn is more reactive than Cu and forms white solution called ZnSO4 (Zinc sulphate) while Cu after losing the bond with SO4 (Sulphate) settles down.

And when iron pieces are added in blue colored solution (CuSO4) of test tube B, blue color turns to green (FeSO4) and a reddish brown solid(Cu) gets accumulated in bottom of the test tube.

     Reason : Here Fe replaces Cu from CuSO4 since Fe is more reactive than Cu and forms green solution called FeSO4 (ferrous sulphate) while Cu after losing the bond with SO4 (Sulphate) settles down.

That's all.