25 JEE Main 2021 Aldehydes and Ketones previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2021 previous-year questions from the Aldehydes and Ketones chapter of Chemistry. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Aldehydes and Ketones chapter hub.
Experimentally reducing a functional group cannot be done by which one of the following reagents ?
Which of the following reagent is suitable for the preparation of the product in the above reaction?
Identify A in the given chemical reaction.
The structures of A and B formed in the following reaction are : Ph = - C 6 H 5
Consider the given reaction, the product ' X ' is:
Which of the following reagent is used for the following reaction? CH 3 CH 2 CH 3   → ? CH 3 CH 2 CHO  
A and B in the following reactions are:
Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence of H…
Considering the above reaction, the major product among the following is:
The structure of the starting compound P used in the reaction given below is:
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