Question

Give examples of chemical change that cause colour to change

Answer 1

Dear student,
Chemical changes which results in color change are-
1. Reaction of iron and copper sulphate

CuSO₄+Fe------>FeSO₄+Cu
(blue) (green)
here, Color changes from blue to green.

2. Cu + O₂ + ​​​​​H₂O +CO₂ -----> CuCO₃, which changes color from brown to blue or blue green.

3. Rusting of iron
4. Blackening of surfaces of cut vegetables and fruits etc.

Regards.