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 first reaction produces $H_3PO_3$ (phosphorous acid) as by-product with $RCl$. The second produces $POCl_3$ (phosphoryl chloride) with $RCl$ and $HCl$.

Answer 2

Step 1: Analyze the Reaction with PCl₃

When alcohol (\( \text{ROH} \)) reacts with PCl₃, it produces alkyl chloride (RCl) and phosphorus oxychloride (POCl₃).

Thus, the product A is POCl₃.

Step 2: Analyze the Reaction with PCl₅

When alcohol (\( \text{ROH} \)) reacts with PCl₅, it forms alkyl chloride (RCl) and hydrogen chloride (HCl), along with the formation of phosphoric acid (H₃PO₃).

Thus, the product B is H₃PO₃.

Step 3: Conclusion

The correct answer is:

Option (4): H₃PO₃ and POCl₃.