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Benzene carbaldehyde is reacted with con...

Benzene carbaldehyde is reacted with concentrated NaOH solution, to give the products 'A' and 'B'. The prodcut 'B' is an aromatic hydroxy compounds where OH group in linked to `sp^(3)` hybridised carbon atom next to benzene ring. The products 'A' and 'B' are respectibvely:

A

Sodium benzoate and phenol

B

Sodium benzoate and phenyl methanol

C

Sodium benzoate and cresol

D

Sodium benzoate and picric acid

Text Solution

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The correct Answer is:
To solve the problem, we need to analyze the reaction of benzene carbaldehyde (also known as benzaldehyde) with concentrated sodium hydroxide (NaOH) and identify the products 'A' and 'B'. ### Step-by-Step Solution: 1. **Identify the Structure of Benzene Carbaldehyde**: - Benzene carbaldehyde is represented as C6H5CHO. The structure consists of a benzene ring (C6H5) attached to a carbonyl group (C=O) with a hydrogen atom (H) attached to the carbonyl carbon. 2. **Understand the Reaction Conditions**: - The reaction is carried out with concentrated NaOH. This indicates that we are likely dealing with a special reaction type, specifically the Cannizzaro reaction, which occurs with aldehydes that do not have alpha hydrogens. 3. **Recognize the Cannizzaro Reaction**: - In the Cannizzaro reaction, one molecule of the aldehyde is oxidized to a carboxylic acid salt, while another molecule is reduced to an alcohol. Since benzaldehyde has no alpha hydrogen, it will undergo this reaction. 4. **Determine the Products**: - When benzaldehyde reacts with concentrated NaOH: - One molecule is oxidized to sodium benzoate (C6H5COONa). - The other molecule is reduced to benzyl alcohol (C6H5CH2OH). 5. **Identify Products 'A' and 'B'**: - Product 'A' is the sodium benzoate (C6H5COONa). - Product 'B' is benzyl alcohol (C6H5CH2OH), which is an aromatic hydroxy compound where the OH group is attached to an sp³ hybridized carbon atom next to the benzene ring. 6. **Final Answer**: - Therefore, the products 'A' and 'B' are: - A: Sodium Benzoate (C6H5COONa) - B: Benzyl Alcohol (C6H5CH2OH) ### Conclusion: The correct answer is: - Product A: Sodium Benzoate - Product B: Benzyl Alcohol
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