Odisha Board Solutions for Chapter: s-Block Elements:Alkali and Alkaline Earth Metals. Alkali Metals:(Group 1), Exercise 1: QUESTIONS

Comment on the following: Alkali metals impart characteristic colours to the flame.

Giving chemical equation state what happens when ammonia reacts on a mixture of ${\mathrm{K}}_2{\mathrm{CO}}_3$ and carbon at a high temperature.

How is sodium isolated by Down's process? Write equations for the reactions involved. Why can sodium metal not be isolated by electrolysis of an aqueous solution of sodium chloride?

Explain the following: Alkali metals are obtained by the electrolysis of their molten salts but not by the electrolysis of their aqueous solution.

Explain the following: The softness of Group$-\mathrm{I} \mathrm{A}$ metals decreases down the Group with increasing atomic number.

Explain the following: Aqueous solution of sodium chloride is a good conductor of electricity while solid sodium chloride is a non-conductor.

Give the general trends in the properties of alkali metals. Write the principle of manufacture of potassium chlorate.

Give the comparative account of properties of alkali metals. Write any two uses of potassium chlorate.