$S{O}_2$ gas was prepared by
(i) burning sulphur in oxygen,
(ii) reacting sodium sulphite with dilute $H_{2}S{O}_4$ and
(iii) heating copper with $conc.H_{2}S{O}_4$. It was found that in each case sulphur and oxygen combined in the ratio of 1 : 1. The data illustrates the law of :

Q. illustrate the law of definite proportions from the following table 1)0.32 g of sulphur on burning in air produced 224 ml of SO2 at N.T.P. 2)a metal sulphite reacts with a mineral acid to give SO2gas which contains 50% of sulphur and 50% of oxygen

Q. Name the gas evolved in each of the following cases:
(i) Copper carbonate is heated strongly.
(ii) Action of dilute hydrochloric acid on sodium sulphite.
(iii) Nitrogen combines with hydrogen.
(iv) Action of dilute sulphuric acid on sodium carbonate.
(v) Addition of sodium to cold water.

Q. In $S{O}_2$ and $S{O}_3$, the ratio of weight of oxygen that combines with a fixed weight of sulphur is $2:3$. This illustrates the law of:

Q. Identify the gas evolved and give the chemical test in each of the following case :
(i) Dilute hydrochloric acid reacts with sodium sulphite.
(ii) Dilute hydrochloric acid reacts with iron (II) sulphide.

Q. $2.8g$ of calcium oxide prepared by heating limestone were found to contain $0.8g$ of oxygen. When one gram of oxygen was treated with calcium, $3.5g$ of calcium oxide was obtained. Show that the results illustrate the law of definite proportions.