Question

7. On reaction of aqueous copper sulphate and iron metal, colour of the
solution after some time changes to
a. Colourless to Light Green
b. Colourless to Light Blue
c. Light Blue to Colourless
d. Light Blue to Light Green​

Answer 1

iron ions in the solution decreases in conc copper solution cause the blue colour of the Sol to fade away and a greenish colour develop

Answer 2

On the reaction of aqueous copper sulphate and iron metal, the color of the

solution after some time changes to:

d. Light Blue to Light Green

• When iron metal is dipped into copper sulphate, the color of the solution changes and a coating of copper is deposited on the iron.

• The reaction involved is:

        Fe(s)+CuSO₄⟶Cu(s)+FeSO₄