The compounds obtained by heating of orthophosphoric acid are: — p Block Elements Chemistry Question

💡 Solution & Explanation

Step 1: Phosphorus trichloride (PCl3) has phosphorus in the +3 oxidation state and reacts vigorously with water. Step 2: Complete hydrolysis of PCl3 occurs without any change in the oxidation state of phosphorus, yielding phosphorous acid (H3PO3) and hydrochloric acid (HCl): PCl3 + 3H2O -> H3PO3 + 3HCl. Step 3: Therefore, the hydrolysis products are H3PO3 and HCl, corresponding to option (a).