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Example-1

Example
Reimer–Tiemann reaction involves a:
  1. carbonium ion intermediate
  2. carbene intermediate
  3. carbanion intermediate
  4. free radical intermediate
Solution (B)
Reimer–Tiemann reaction involves a carbene intermediate.
 
Description: 53673.png
Description: 52696.png
 

Example-2

Example-2
The reagent which does not give acid chloride on treating with a carboxylic acid is:
  1. Description: 51923.png
  2. Description: 51931.png
  3. Description: 51938.png
  4. Description: 51947.png
Solution (B)
Description: 51955.png
 
Description: 51963.png
 
Description: 51972.png
 
Description: 51981.png
 

Example-3

Example-3
In a set of reactions, acetic acid yielded a product D:
 
Description: 51991.png
 
The structure of D will be:
  1. Description: 52710.png
  2. Description: 52719.png
  3. Description: 52727.png
  4. Description: 52736.png
Solution (D)
Description: 52748.png
 

Example-4

Example-4
Which of the following carboxylic acids undergoes decarboxylation easily?
  1. C6H5COCOOH
  2. C6H5COCH2COOH
  3. Description: 51999.png
  4. Description: 52008.png
Solution (B)
b-Keto acid upon heating undergoes decarboxylation via a six-membered cyclic transition state:
 
Description: 52758.png
 




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