Problem 1
What are the common physical and chemical features of alkali metals?
Problem 2
Discuss the general characteristics and gradation in properties of alkaline earth metals.
Problem 3
Why are alkali metals not found in nature?
Problem 4
Find out the oxidation state of sodium in \(\mathrm{Na}_{2} \mathrm{O}_{2}\).
Problem 5
Explain why is sodium less reactive than potassium.
Problem 6
Compare the alkali metals and alkaline earth metals with respect to (i) ionisation enthalpy (ii) basicity of oxides and (iii) solubility of hydroxides.
Problem 8
Explain why can alkali and alkaline earth metals not be obtained by chemical reduction methods?
Problem 11
Explain the reasons for this type of colour change. Beryllium and magnesium do not give colour to flame whereas other alkaline earth metals do so. Why?
Problem 15
Compare the solubility and thermal stability of the following compounds of the alkali metals with those of the alkaline earth metals. (a) Nitrates (b) Carbonates (c) Sulphates.
Problem 16
Starting with sodium chloride how would you proceed to prepare (i) sodium metal (ii) sodium hydroxide (iii) sodium peroxide (iv) sodium carbonate ?
