Match the reactions (in the given stoichiometry of the reactants) in List-I with one of their products given in List-II and choose the correct option. List-I List-II (P) P 2 O 3 + 3 H 2 O → (1) P ( O ) OCH 3 Cl 2 (Q) P 4 + 3 NaOH + 3 H 2 O → (2) H 3 PO 3 (R) PCl 5 + CH 3 COOH → (3) PH 3 (S) H 3 PO 2 + 2 H 2 O + 4 AgNO 3 → (4) POCl 3 (5) H 3 PO 4
D. P → 2 ;   Q → 3 ;   R → 4 ;   S → 5
Phosphorus trioxide reacts with water to form phosphorous acid, P 2 O 3 + 3 H 2 O → 2 H 3 PO 3 When acetic acid is heated with phosphorus pentachloride, acetyl chloride is obtained. In this reaction, − COOH group is converted to − COCl group. The side products are phosphorus oxychloride and HCl . PCl 5 + CH 3 COOH → CH 3 COCl + POCl 3 + HCl P 4 undergo disproportionation reaction with sodium hydroxide. P 4 + 3 NaOH + 3 H 2 O   → PH 3 + 3 NaH 2 PO 2 Due to the presence two P - H bonds, H 3 PO 2 acts as reducing agent. It reduces Ag + to Ag . H 3 PO 2 + H 2 O + AgNO 3 → H 3 PO 4 + HNO 3 + Ag ↓
Related: Chemistry — Carboxylic Acid Derivatives · All PYQ Banks