Q.

The products A and B obtained in the following reactions, respectively, are:

3ROH+PCl3RCl+A

ROH+PCl5RCl+HCl+B                    [2024]
 

1 POCl3 and H3PO3  
2 POCl3 and H3PO4  
3 H3PO4 and POCl3  
4 H3PO3 and POCl3  

Ans.

(4)