Question

The products A and B obtained in the following reactions, respectively, are
3ROH+PCI₃→3RCI+A 
ROH+PCI₅→RCI+HCI+B

• A. POCI₃ and H₃PO₃
• B. POCI₃ and H₃PO₄
• C. H₃PO₄ and POCI₃
• D. H₃PO₃ and POCI₃

Answer 1

The Correct Option is D

The reactions detail the transformation of alcohols (ROH) into alkyl chlorides (RCl) utilizing phosphorus chlorides (PCl₃ and PCl₅). The products are identified as follows:

1. For the reaction 3ROH + PCl₃ → 3RCl + A, alcohols react with phosphorus trichloride (PCl₃) to yield alkyl chlorides (RCl) and byproduct A. The balanced equation is: PCl₃ + 3ROH → 3RCl + H₃PO₃. Therefore, product A is H₃PO₃ (phosphorous acid).

2. In the reaction ROH + PCl₅ → RCl + HCl + B, the alcohol is converted to the alkyl chloride (RCl), with hydrogen chloride (HCl) and phosphorus-containing compound B also produced. Phosphorus pentachloride (PCl₅) is involved. The balanced equation is: PCl₅ + ROH → RCl + HCl + POCl₃. Consequently, product B is POCl₃ (phosphoryl chloride).

The identified products A and B for each reaction are summarized:

Reaction	Product A	Product B
3ROH+PCl3→3RCl+A	H3PO3	-
ROH+PCl5→RCl+HCl+B	-	POCl3

The determined products are H₃PO₃ and POCl₃.