Crystals of copper sulphate are heated in a test tube for some time.
What is the source of liquid droplets seen on the inner upper side of the test tube during the heating process?

Crystals copper sulphate are heated in a test tube for some time. What is the colour of copper sulphate crystals (i) before heating and (ii) after heating.

2g of ferrrous sulphate crystals wre heated in a hard glass tube and observations recorded: Identify the liquids droplets collected on the cooler parts of the test tube.

State what is observed when iodine is heated in a test tube

2g of ferrrous sulphate crystals wre heated in a hard glass tube and observations recorded: What type of odour is obeserved on heating ferrous sulphate crystals?

2g of ferrrous sulphate crystals wre heated in a hard glass tube and observations recorded: What type reaction is taking place?

• 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 ?