Consider the activity of heating ferrous sulphate `FeSO_4. 7H_2O` crystals in a test tube. Complete the sentences:

A student performed the experiment of heating ferrous sulphate crystals in a boiling tube. He smell fumes of a pungent gas saw colours of ferrous sulphate disappear Why does the colour of crystals disappear?

A student performed the experiment of heating ferrous sulphate crystals in a boiling tube. He smell fumes of a pungent gas saw colours of ferrous sulphate disappear Identify the nature of this chemical reaction.

A student performed the experiment of heating ferrous sulphate crystals in a boiling tube. He smell fumes of a pungent gas saw colours of ferrous sulphate disappear Write the chemical formula of the pungent gas

On heating crystals of ferrous sulphate, products obtained are:

•Take about 2 g ferrous sulphate crystals in a dry bottle tube. • Note the colour of the ferrous sulphate crystals. • Heat the boiling tube over the flame of a burner or spirit lamp as shown in Fig. Observe the colour of the crystals after heating.

Name the product formed on strongly heating ferrous sulphate crystals. What type of chemical reaction occurs in this change?

What is the colour of ferrous sulphate crystals? How does this colour change after heating?

Madhurima added a few iron fillings to 5 mL of aluminium sulphate Al_2(SO_4)_3 solution in a test tube. The correct observation for change in colour of solution by her is

What is the action of heat on K_2Cr_2O_7 and KMnO_4 ?