T/F Blue colour of copper sulpahte solution disappears when some aluminium powder is added in it.

Why blue color of copper sulphate solution disappear when iron nail is immeresed in it?

Copper sulphate solution is green in colour.

Why does the colour of copper sulphate solution change,when an iron nail is dipped in it?

Blue colour of copper sulphate crystals is due to water of cystallistation. Describe an activity with diagram to show it.

When in the blue solution of copper sulphate, Zinc srtip is dipped, after some time colour changes to:

• Take three iron nails and clean them by rubbing with sand paper. • Take two test tubes marked as (A) and (B). In each test | tube, take about 10 ml copper sulphate solution. • Tie two iron nails with a thread and immerse them 'carefully in the copper sulphate solution in test tube B for about 20 minutes [Fig. (a)]. Keep one iron nail aside for comparison. • After 20 minutes, take out the iron nails from the copper sulphate solution. • Compare the intensity of the blue colour of copper sulphate solutions in test tubes (A) and (B) (Fig. (b)]. Also, compare the colour of the iron nails dipped in the copper sulphate solution with the one kept aside [Fig. - (b)]. On the basis of activity , give the answers of th following questions : What is the colour of copper sulphat solution in test tube A ?