Among the following acids, if number of acids stronger than $H_{3}P{O}_4$ is $x$ and number of monobasic acids is $y$ then $\frac{x}{y}$ would be?
$H_{2}C{O}_3,H_{3}P{O}_3,C{H}_{3}C{O}_{2}H,H_{2}S{O}_4,H_{3}P{O}_2,H_4{P}_2{O}_7,HCl{O}_4,H_{3}B{O}_3,HN{O}_3$.

Monobasic acids: Basicity of an acid is the number of hydronium ions formed by one molecule of the acid in its aqueous solution. A monobasic acid has only one hydrogen ion to donate to a base in an acid-base reaction.
$HN{O}_3,C{H}_{3}C{O}_{2}H,H_{3}B{O}_3,H_{3}P{O}_2,HCl{O}_4$
Structure of $HN{O}_3$:
Structure of $C{H}_{3}C{O}_{2}H$:
Structure of $H_{3}B{O}_3$:
Structure of $H_{3}P{O}_2$:
Structure of $HCl{O}_4$:

Hence, value of $y=5$

The stronger acids than $H_{3}P{O}_4$ are:
Hence, value of $x=6$
$\text{Therefore}\frac{x}{y}=\frac{6}{5}=1.2$