Problem 28
Write balanced equations for reactions between (a) \(\mathrm{Na}_{2} \mathrm{O}_{2}\) and water (b) \(\mathrm{KO}_{2}\) and water (c) \(\mathrm{Na}_{2} \mathrm{O}\) and \(\mathrm{CO}_{2}\).
Problem 29
How would you explain the following observations? (i) \(\mathrm{BeO}\) is almost insoluble but \(\mathrm{BeSO}_{4}\) is soluble in water, (ii) \(\mathrm{BaO}\) is soluble but \(\mathrm{BaSO}_{4}\) is insoluble in water, (iii) LiI is more soluble than KI in ethanol.
Problem 30
Which of the alkali metal is having least melting point? (a) Na (b) \(\mathrm{K}\) (c) \(\mathrm{Rb}\) (d) Cs
