Question

The normality of $0.3\text{M}$ phosphorous acid ($H_{3}P{O}_3$) is :

• A. $0.1$
• B. $0.9$
• C. $0.3$
• D. $0.6$

Answer 1

The correct option is D $0.6$

As $H_{3}P{O}_3$ is dibasic acid, $N=M\times 2=0.3\times 2=0.6\text{N}$