Question:
Which of the following statements is true regarding Cannizzaro reaction?
Which of the following statements is true regarding Cannizzaro reaction?
Show Hint
It is a disproportionation of aldehydes without alpha H.
Updated On: Oct 1, 2026
- Some aldehydes are converted to the respective alcohols and the salt of the respective carboxylic acid.
- Alcohol is converted into aldehyde
- Primary amine is converted into isocyanide
- Acid is converted into amine
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Cannizzaro reaction is the disproportionation of aldehydes that have no alpha hydrogen, when treated with concentrated alkali.
Step 2: What happens:
One molecule of the aldehyde is oxidised to a carboxylate salt, and another is reduced to an alcohol. For example
\[ 2HCHO + NaOH \rightarrow CH_3OH + HCOONa \]
Step 3: Check the options:
(A) says some aldehydes give the alcohol and the salt of the acid, which is exactly this. (B) Alcohol to aldehyde is an oxidation, not Cannizzaro. (C) Amine to isocyanide is the carbylamine reaction. (D) Acid to amine is a Hofmann or Schmidt type change. So (A) is true.
Final Answer:
Cannizzaro gives an alcohol and a carboxylate salt. \[ \boxed{A} \]
Cannizzaro reaction is the disproportionation of aldehydes that have no alpha hydrogen, when treated with concentrated alkali.
Step 2: What happens:
One molecule of the aldehyde is oxidised to a carboxylate salt, and another is reduced to an alcohol. For example
\[ 2HCHO + NaOH \rightarrow CH_3OH + HCOONa \]
Step 3: Check the options:
(A) says some aldehydes give the alcohol and the salt of the acid, which is exactly this. (B) Alcohol to aldehyde is an oxidation, not Cannizzaro. (C) Amine to isocyanide is the carbylamine reaction. (D) Acid to amine is a Hofmann or Schmidt type change. So (A) is true.
Final Answer:
Cannizzaro gives an alcohol and a carboxylate salt. \[ \boxed{A} \]
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