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Aldehydes Ketones and Carboxylic Acids question

2015 · Shift 2 · Q8
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Aldehydes Ketones and Carboxylic Acids question

2015 · Shift 2 · Q8

JEE AdvancedChemistryAldehydes Ketones and Carboxylic AcidsNumerical+3 / −1
Among the following the number of reactions that produces benzaldehyde is ‾\underline{\hspace{2cm}}​. JEE Advanced 2015 Paper 2 Offline Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 44 English
Numerical answer
View written solutionFree

Correct answer: PLEASE PROVIDE THE REACTION SCHEMES/OPTIONS. WITH THE CURRENT INCOMPLETE QUESTION, THE ANSWER CANNOT BE DETERMINED.

The question asks for the number of reactions that produce benzaldehyde.

However, the actual list of reactions/options is missing from the prompt. Without the given reactions, it is impossible to determine how many of them yield benzaldehyde.

Why this cannot be solved as stated

To count the number of reactions producing benzaldehyde, we must inspect each reaction individually, for example reactions such as:

  1. Oxidation/reduction of suitable benzyl derivatives
  2. Stephen reaction
  3. Gattermann–Koch formylation
  4. Hydrolysis of benzal chloride under suitable conditions
  5. Rosenmund reduction of benzoyl chloride

But since the question does not include the actual reactions, there is no way to verify whether the count is 1, 2, 4, or some other number.

Comparison with stored answer

The stored correct answer is given as 4, but based only on the information provided here, that value cannot be independently derived.

So I must disagree with the stored answer for the current incomplete prompt, not because 4 is necessarily wrong, but because the required reaction list is absent.

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