NCERT Solutions for Chapter: The s-Block Elements, Exercise 1: Short Answer Type

Discuss the trend of the following:

Thermal stability of carbonates of Group $2$ elements. 

Discuss the trend of the following:

The solubility and the nature of oxides of group $2$ elements.

Why are ${\mathrm{BeSO}}_4$ and ${\mathrm{MgSO}}_4$ readily soluble in water while ${\mathrm{CaSO}}_4,{\mathrm{SrSO}}_4$ and ${\mathrm{BaSO}}_4$ are insoluble?

All compounds of alkali metals are easily soluble in water but lithium compounds are more soluble in organic solvents. Explain.

In the Solvay process, can we obtain sodium carbonate directly by treating the solution containing $({\mathrm{NH}}_4{)}_2{\mathrm{CO}}_3$ with sodium chloride? Explain. 

Write Lewis structure of ${\mathrm{O}}_2^{-}$  ion and find out oxidation state of each oxygen atom? What is the average oxidation state of oxygen in this ion? 

Why do beryllium and magnesium not impart colour to the flame in the flame test?

What is the structure of ${\mathrm{BeCl}}_2$ molecule in gaseous and solid state?