Which of the following statements illustrate the law of multiple proportions?

Options

A. 3 . 47 g of `BaCl_(2) ` reacts with 2. 36 g ` Na_(2) SO_(4)` to give 3 . 88 g `BaSO_(4) ` and 1 . 95 h NaCl
B. Hydrogen sulphide contains `5.89%` hydrogen, water contains `11.1%` hydrogen and sulphur dioxide contains `50%` oxygen
C. An element forms two oxides , XO and `XO_(2)` containing `50% and 60%` oxygen respectivley . The ratio of masses of oxygen which combines with 1 g of element is 2 : 3
D. 20 mL ammonia gives 10 volumes `N_(2)` and 30 volumes `H_(2)` at constant temperature and pressure

Answer

C

Explanation

In XO, 50 g of element combines with 50 g of oxygen
`:.` 1 g of element combines with 1 g of oxygen In `XO_(2) , 40 , g ` element combines with 60 g of oxygen
Thus, ratio of masses of oxygen which combines with 1 g of element is 1 : 1 . 5 or 2 : 3 . This is in accordance with the law of multiple proportions . In (b) the law of reciprocal proportions is followed in (a) law of conservation mass is followed while in (d) Avogadro.s law is followed