Q. In hypophosphorus acid the number of hydroxyl groups present are :
EAMCETEAMCET 1996
Solution:
Hypophosphorus acid is $ {{\text{H}}_{\text{3}}}\text{P}{{\text{O}}_{\text{2}}} $ and its structure is
so, $ {{\text{H}}_{\text{3}}}\text{P}{{\text{O}}_{\text{2}}} $ has only one hydroxyl group.
