1. Which of the following alcohols reacts instantaneously with Lucas reagent?

(1).

(2).

(3).

(4).

2. Major products A and B formed in the following reaction sequence , are

(1).

(2).

(3).

(4).

3. The products A and B obtained in the following reactions, respectively, are
\(3\text{ROH}\,+\,\text{PCl}_3\,\rightarrow\,3\text{RCl}\,+\,A\)
\(\text{ROH}\,+\,\text{PCl}_5\,\rightarrow\,\text{RCl}\,+\,\text{RCl}\,+\,B\)

(1).\(\text{H}_3\text{PO}_4\) and \(\text{POCl}_3\)

(2). \(\text{H}_3\text{PO}_3\) and \(\text{POCl}_3\)

(3). \(\text{POCl}_3\) and \(\text{H}_3\text{PO}_3\)

(4). \(\text{POCl}_3\) and \(\text{H}_3\text{PO}_4\)

4. Total number of possible isomers (both structural as well as stereoisomers) of cyclic ethers of molecular formula C₄H₈O is :

(1).11

(2). 6

(3). 8

(4). 10