NEET
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- NEET
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- Chemistry
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- Carboxylic Acid Derivatives
NEET · Chemistry · Carboxylic Acid Derivatives
How many of the following reactions will yield a ketone as one of...
How many of the following reactions will yield a ketone as one of the major organic products?
(i) Ozonolysis of 2,3-dimethylbut-2-ene followed by reaction with
(ii) Reaction of benzene with acetyl chloride in the presence of anhydrous
(iii) Oxidation of butan-2-ol with
(iv) Oxidation of toluene with alkaline followed by heating
(v) Ozonolysis of propene followed by reaction with
(i) Ozonolysis of 2,3-dimethylbut-2-ene followed by reaction with
(ii) Reaction of benzene with acetyl chloride in the presence of anhydrous
(iii) Oxidation of butan-2-ol with
(iv) Oxidation of toluene with alkaline followed by heating
(v) Ozonolysis of propene followed by reaction with
Options
- A1
- B2
- C3
- D4
Correct answer
C. 3
Step-by-step solution
(i) Ozonolysis of 2,3-dimethylbut-2-ene followed by (reductive ozonolysis) yields two molecules of propanone (acetone), which is a ketone.
(ii) Benzene reacts with acetyl chloride in the presence of anhydrous (Friedel-Crafts acylation) to yield acetophenone, which is a ketone.
(iii) Oxidation of butan-2-ol (a secondary alcohol) with yields butan-2-one, which is a ketone.
(iv) Oxidation of toluene with alkaline and heat yields potassium benzoate, which is a salt of a carboxylic acid, not a ketone.
(v) Reductive ozonolysis of propene yields ethanal (acetaldehyde) and methanal (formaldehyde), both of which are aldehydes, not ketones.
Therefore, exactly 3 reactions yield a ketone as a major product.
Answer: 3
(ii) Benzene reacts with acetyl chloride in the presence of anhydrous (Friedel-Crafts acylation) to yield acetophenone, which is a ketone.
(iii) Oxidation of butan-2-ol (a secondary alcohol) with yields butan-2-one, which is a ketone.
(iv) Oxidation of toluene with alkaline and heat yields potassium benzoate, which is a salt of a carboxylic acid, not a ketone.
(v) Reductive ozonolysis of propene yields ethanal (acetaldehyde) and methanal (formaldehyde), both of which are aldehydes, not ketones.
Therefore, exactly 3 reactions yield a ketone as a major product.
Answer: 3