In the reaction $N_2 + 3H_2 \rightarrow 2NH_3$,the ratio of volumes of $N_2$,$H_2$,and $NH_3$ is $1 : 3 : 2$. This illustrates which law?

Which of the following pairs of substances illustrates the Law of Multiple Proportions?

Which of the following sets of compounds illustrates the Law of Multiple Proportions?

Define the Law of Multiple Proportions.

In $SO_2$ and $SO_3$,the masses of oxygen that combine with $48 \, g$ of sulfur are respectively ......... .

To check the principle of multiple proportions,a series of pure binary compounds $(P_m Q_n)$ were analyzed and their composition is tabulated below. The correct option$(s)$ is(are)

Compound	Weight $\%$ of $P$	Weight $\%$ of $Q$
$1$	$50$	$50$
$2$	$44.4$	$55.6$
$3$	$40$	$60$

$(A)$ If empirical formula of compound $3$ is $P_3 Q_4$,then the empirical formula of compound $2$ is $P_3 Q_5$.
$(B)$ If empirical formula of compound $3$ is $P_3 Q_2$ and atomic weight of element $P$ is $20$,then the atomic weight of $Q$ is $45$.
$(C)$ If empirical formula of compound $2$ is $PQ$,then the empirical formula of the compound $1$ is $P_5 Q_4$.
$(D)$ If atomic weight of $P$ and $Q$ are $70$ and $35$,respectively,then the empirical formula of compound $1$ is $P_2 Q$.