Chemistry - Complete P-block Question with Solution | TestHub

(a) Hypophosphorus acid : ${\mathrm{H}}_3\underline{\mathrm{P}}{\mathrm{O}}_2$

$\left(+1\right)3+\mathrm{x}+\left(-2\right) 2=0$

$\mathrm{x}=+1$

(b) Orthophosphoric acid : ${\mathrm{H}}_3\underline{\mathrm{P}}{\mathrm{O}}_4$

$\left(+1\right)3+\mathrm{x}+\left(-2\right)4=0$

$\mathrm{x}=+5$

(c) Hypophosphoric acid : ${\mathrm{H}}_4{\mathrm{P}}_2{\mathrm{O}}_6$

$\left(+1\right)4+2\mathrm{x}+\left(-2\right)6=0$

$\mathrm{x}=+4$

(d) Orthophosphorous acid : ${\mathrm{H}}_3\underline{\mathrm{P}}{\mathrm{O}}_3$

$\left(+1\right)3+\mathrm{x}+\left(-2\right)3=0$

$\mathrm{x}=+3$