Aldehydes Ketones and Carboxylic Acids Practice Questions
NEET · Chemistry · 1491 free MCQs with instant results and detailed explanations.
1491
Total
309
Easy
665
Medium
517
Hard
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Topics in Aldehydes Ketones and Carboxylic Acids
Distinction Tests
359
Named Reactions
380
Properties
366
Preparation
386
Sample Questions from Aldehydes Ketones and Carboxylic Acids
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which of the following methods can be used to prepare aldehydes?
A.
Oxidation of primary alcohols
B.
Reduction of ketones
C.
Hydrolysis of nitriles
D.
Oxidation of secondary alcohols
Show Answer & Explanation
Correct Answer: A
Primary alcohols can be oxidized to form aldehydes, making option A correct.
Q2
Easy
Which of the following reagents can be used to convert an alcohol into a ketone?
A.
PCC (Pyridinium chlorochromate)
B.
LiAlH4
C.
SOCl2
D.
H2O
Show Answer & Explanation
Correct Answer: A
PCC oxidizes alcohols to ketones and aldehydes, thus making option A the correct choice.
Q3
Easy
Which reaction can be used to prepare carboxylic acids from alcohols?
A.
Complete oxidation
B.
Reduction
C.
Dehydration
D.
Halogenation
Show Answer & Explanation
Correct Answer: A
Complete oxidation of alcohols yields carboxylic acids, confirming option A is correct.
Q4
Medium
Which of the following reactions can be used to prepare aldehydes from primary alcohols?
A.
Oxidation with CrO3
B.
Reduction with LiAlH4
C.
Hydration of alkynes
D.
Dehydrogenation of secondary alcohols
Show Answer & Explanation
Correct Answer: A
Oxidation of primary alcohols with CrO3 leads to the formation of aldehydes, since further oxidation will lead to carboxylic acids.
Q5
Medium
Which reagent can be used to convert a ketone to an alcohol?
A.
H2 with Ni catalyst
B.
KMnO4
C.
SOCl2
D.
NaBH4
Show Answer & Explanation
Correct Answer: D
Sodium borohydride (NaBH4) is a reducing agent that can selectively reduce ketones to secondary alcohols.
Q6
Medium
What is the main product when propanoic acid is treated with SOCl2?
A.
Propyl chloride
B.
Propanoic anhydride
C.
Propyl alcohol
D.
Propionyl chloride
Show Answer & Explanation
Correct Answer: D
When propanoic acid reacts with thionyl chloride (SOCl2), the reaction produces propionyl chloride (an acyl chloride).
Q7
Medium
Which of the following methods is NOT used for the preparation of aldehydes?
A.
Hydrolysis of nitriles
B.
Ozonolysis of alkenes
C.
Reduction of carboxylic acids
D.
Benzoin condensation
Show Answer & Explanation
Correct Answer: D
Benzoin condensation does not produce aldehydes; it forms a hydroxy ketone instead.
Q8
Hard
Which of the following methods is NOT commonly used for the preparation of aldehydes?
A.
Oxidation of primary alcohols
B.
Hydrolysis of nitriles
C.
Reduction of esters
D.
Dehydration of alcohols
Show Answer & Explanation
Correct Answer: D
Dehydration of alcohols typically leads to alkene formation rather than aldehydes. In contrast, oxidation of primary alcohols, hydrolysis of nitriles, and reduction of esters can yield aldehydes.
Q9
Hard
What is the product of the oxidation of propan-2-ol using potassium dichromate in acidic medium?
A.
Propanal
B.
Acetone
C.
Propanoic acid
D.
2-Methyl-2-propanal
Show Answer & Explanation
Correct Answer: B
Propan-2-ol is a secondary alcohol that gets oxidized to acetone when treated with potassium dichromate in acidic medium, forming a ketone rather than an aldehyde or acid.
Q10
Hard
Which reagent can be used to convert a carboxylic acid directly into an aldehyde?
A.
Lithium aluminium hydride
B.
Boron trifluoride
C.
Diisobutylaluminium hydride
D.
Sodium borohydride
Show Answer & Explanation
Correct Answer: C
Diisobutylaluminium hydride (DIBAL-H) selectively reduces carboxylic acids to aldehydes under controlled conditions, unlike the other reagents which either reduce to alcohols or perform different reactions.
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Aldehydes Ketones and Carboxylic Acids — NEET Chemistry Practice Questions Online
This page contains 1491 practice MCQs for the chapter Aldehydes Ketones and Carboxylic Acids in NEET Chemistry. The questions are organized by difficulty — 309 easy, 665 medium, 517 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 4 topics, giving you comprehensive coverage of the entire chapter.