Question

Dry distillation of calcium salt of adipic acid gives?
(A)

(B)

(C)

(D)

Answer 1

Hint: Dry distillation is the heating of solid materials to produce gaseous product. This method involves Pyrolysis or Thermolysis or it may not.

Complete step by step answer:
The formula of calcium salt of adipic acid is:

It produces cyclopentanone on dry distillation

So, the correct answer is “Option A”.

     

Additional Information:
Dry distillation of calcium salt of carboxylic acid is a very good method of preparation of aldehyde and ketones.
Equimolar mixture of calcium salts of two different carboxylic acids on dry distillation gives mixed ketones.
Example

Dry distillation is also known as destructive distillation and is a type of pyrolysis. It is usually with wood or coal. The substance should contain high content of organic matter.


Note:
Dry distillation of Calcium salts of aliphatic and aromatic acid is a good method for preparation of symmetric ketones.
Symmetric ketones mean when same alkyl groups are attached to

group.
Example:

But aldehydes are obtained when calcium salts of aromatic acid and Calcium formate are pyrolysed together.