Question

Which of the following has the same molecular weight and equivalent weight

• A. $H_{3}P{O}_2$
• B. $H_{3}P{O}_3$
• C. $H_{3}P{O}_4$
• D. $H_{2}S{O}_2$

Answer 1

The correct option is A $H_{3}P{O}_2$

Equivalent weight is equal to molecular weight divided by n- factor.
n−factor in the case of H₃PO₂=1. Therefore its molecular weight and equivalent weight are the same.