Question

The number of hydrogen atoms attached to phosphorus atom in hypophosphorous acid is :

• A. two
• B. one
• C. zero
• D. three

Answer 1

Answer: (A)

Molecular formula of Hypophosphorous Acid is $H_{3}P{O}_2$.

In this, two hydrogen atoms are attached to phosphorus atom with single bond, one -OH group is attached to phosphorus atom with single bond and one oxygen atom is attached to phosphorus atom with double bond.

Hence,option B is correct.