1. Match each of the items given in List A with the appropriate item given in List B .
List A
List B
(a) Number of acid radicals in \( \mathrm{H}_{2} \mathrm{SO}_{4} \)
(i) \( 24 \mathrm{dm}^{3} \) at r.t.p.
(b) The mass of a compound of giant structure
(ii) MgO
(c) The formula of magnesium oxide
(iii) molar mass
(d) Molar volume of gas
(iv) formula mass
(e) The mass of a mole of substance
(v) 2
2. Calculate the empirical formula of each of the following compounds:
(a) A compound in which 3 g of carbon combines with 4 g of oxygen.
(b) Iron oxide in which the weight of iron is \( 77.7 \% \) and that of oxygen is \( 22.3 \% \).
(c) Water in which hydrogen and oxygen combine in the proportion of 1:8 by weight.
\[
(\mathrm{Fe}=56, \mathrm{C}=12, \mathrm{O}=16, \mathrm{H}=1)
\]
