Question

Which one of the following pairs of compounds illustrates the law of multiple proportions?

• A. $H_{2}O$, $N{a}_{2}O$
• B. $MgO$, $N{a}_{2}O$
• C. $N{a}_{2}O$, $BaO$
• D. $SnC{l}_2$, $SnC{l}_4$

Answer 1

Answer: (D)

$SnC{l}_2$, $SnC{l}_4$

The law of multiple proportions says that if two elements form more than one compounds between them, then the ratios of the masses of the second element which combine with a fixed mass of the first element will be ratios of small whole numbers.

In $SnC{l}_2$ and $SnC{l}_4$, the ratio of the weight of Cl reacting with a constant weight of Sn is 1:2.