1) Identify the compound , in which phosphrous exists in the oxidation state of +1. A) phosphonic acid $(H_{3}PO_{3})$ B) Phosphinic acid $(H_{3}PO_{2})$ C) Pyrophosphrous acid $(H_{4}P_{2}O_{5})$ D) Orthophosphoric acid ($(H_{3}PO_{4})$ Answer: Option BExplanation:
