Question

Element $P,Q$ react to form a compound $P_x{Q}_y.R$ and $P$ react to form $R_y{P}_z$. If $x=2y,z=3y$ and $P$ is hydrogen. Identify the pair of compounds.

• A. $H_{2}S{O}_4,H_{3}P{O}_4$
• B. $HCl,HN{O}_3$
• C. $H_{2}S,N{H}_3$
• D. $HF,Na{N}_3$

Answer 1

The correct option is C $H_{2}S,N{H}_3$

$P_x{Q}_y$
Given $x=2y$
$\therefore P_{2y}{Q}_y=P_{2}Q$ or $H_{2}S$

$R_y{H}_z$
Given $Z=3y$
$R_y{H}_{3y}=R{H}_3$ or $N{H}_3$

$\therefore$ The compounds are $H_{2}S$ and $N{H}_3$.

Hence, option C is correct.