Dr. S.N. DHAWAN, Dr. S.C.KHETERPAL and, P.N.KAPIL Solutions for Chapter: s-Block Elements (Alkali and Alkaline Earth Metals), Exercise 2: ADDITIONAL QUESTIONS

Account for the following:

The hydroxides of alkali metals are strong bases.

Account for the following:

$\mathrm{Na}$ and $\mathrm{K}$ impart colour to the flame but $\mathrm{Mg}$ does not.

Account for the following:

$\mathrm{Li}$ is the best reducing agent in aqueous solution.

Potassium carbonate cannot be prepared by Solvay-ammonia process. Give reason.

What happens when Carbon dioxide is passed through an aqueous solution of sodium carbonate?

What happens when sodium hydrogen carbonate is heated?

What happens when sodium thiosulphate is treated with Dil. ${\mathrm{H}}_2{\mathrm{SO}}_4$?

What happens when sodium thiosulphate is treated with silver nitrate?