Question

On dissolving 1 mole each of the following acids in 1 L of water, the acid which gives a solution of 1 N strength would be

• A. $H_4{P}_2{O}_7$
• B. $H_{3}P{O}_4$
• C. $H_{3}B{O}_3$
• D. $H_{3}P{O}_3$

Answer 1

The correct option is C $H_{3}B{O}_3$

As we are dissolving 1 mole in 1 L of water, the molarity of the solution = 1 M
Normality = molarity $\times$ n-factor

These two quantities will be equal when the n-factor is 1.
n-factor of $H_{3}B{O}_3=1$