question_answer

Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:

A new\[CC\]bond formation is possible in (1) Cannizaro's reaction (2) Friedel-Craft's reaction (3) Clemmensen reduction (4) Reimer-Tiemann reaction

A)  1, 2 and 3 are correct.

B)  1 and 2 are correct.

C)  2 and 4 are correct.

D)  1 and 3 are correct.

Correct Answer: C

Solution :

                 (i) Cannizaro's reaction. \[\therefore \]No new\[CC\]bond is formed. (2) Friedel-Craft's reaction \[\therefore \]One new\[CC\]bond is formed. (3) Clemmensen reduction \[\therefore \] No new\[CC\]bond is formed. (4) Reimer-Tiemann reaction \[+KCl+{{H}_{2}}O\] \[\therefore \]A new\[C-C\]bond is formed. Hence, Friedel-Craft's reaction and Reimer- Tiemann reaction involve the formation of a new\[CC\]bond.