Question

The normality of $0.3\text{M}$ phosphorous acid is

• A. $0.1\text{N}$
• B. $0.9\text{N}$
• C. $0.3\text{N}$
• D. $0.6\text{N}$

Answer 1

The correct option is D $0.6\text{N}$

$H_{3}P{O}_4$ is phosphorous acid whose basicity is 2
now we know that for an acid
$N=aM$
Where $N$ is normality, $a$ is basicity of the acid and $M$ is molarity so
$N=2\times 0.3=0.6N$