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Aldehydes, Ketones & Carboxylic Acids NEET UG Practice Paper Chemistry (PYQs) Part 17

NEET UG – Chemistry Practice Paper PYQs 17 – Aldehydes, Ketones & Carboxylic Acids

Total Questions: 30 | Total Marks: 120

Q1. Which compound gives positive Tollens’ test?




Aldehydes reduce Tollens’ reagent.

Q2. Which compound gives iodoform test?




Methyl ketones give iodoform test.

Q3. Aldehydes are more reactive than ketones due to:




Less steric hindrance and less +I effect.

Q4. Which reagent reduces aldehyde to alcohol?




NaBH₄ reduces carbonyl compounds.

Q5. Cannizzaro reaction occurs in:




Requires absence of α-hydrogen.

Q6. Which compound undergoes Aldol condensation?




Has α-hydrogen.

Q7. Carboxylic acids are acidic due to:




Carboxylate ion is resonance stabilised.

Q8. Which acid is strongest?




−I effect of Cl increases acidity.

Q9. Which compound gives Schiff’s test?




Schiff’s reagent detects aldehydes.

Q10. Which acid forms ester with alcohol?




Esterification reaction.

Q11. Which compound gives silver mirror test?




Formaldehyde reduces Tollens’ reagent.

Q12. Which compound has highest boiling point?




Strong hydrogen bonding (dimer formation).

Q13. Decarboxylation reduces carbon atoms by:




CO₂ removed.

Q14. Which reagent oxidises aldehyde to acid?




Both oxidise aldehydes.

Q15. Which compound shows keto-enol tautomerism?




Has α-hydrogen.

Conclusion: Why Part 17 (Aldehydes, Ketones & Carboxylic Acids) Is Crucial for NEET Organic Chemistry Mastery

The chapter Aldehydes, Ketones & Carboxylic Acids is one of the most concept-intensive and high-yield sections of Organic Chemistry for NEET aspirants. It forms the core of carbonyl chemistry, a topic that not only appears frequently in direct MCQs but also forms the backbone of multi-step reaction and conversion-based questions. NEET UG Chemistry Practice Paper – Part 17 is specifically structured to strengthen conceptual clarity, reaction prediction skills, and accuracy in this important chapter.

One of the major strengths of this chapter lies in understanding the reactivity of the carbonyl group (C=O). NEET often tests why aldehydes are more reactive than ketones, focusing on steric and electronic factors. Students who clearly understand inductive effects and steric hindrance find these comparison questions straightforward. This practice paper ensures repeated exposure to such high-frequency concepts.

Another key scoring area covered in Part 17 is qualitative tests, including Tollens’ test, Schiff’s test, Fehling’s test, and the iodoform test. These are classic NEET favourites. Students frequently confuse which compounds respond positively to these tests. Through structured MCQs, this paper ensures that students confidently identify aldehydes, methyl ketones, and related compounds without hesitation.

The paper also strengthens understanding of important named reactions such as Aldol condensation, Cannizzaro reaction, and decarboxylation. These reactions require conceptual clarity about the presence or absence of α-hydrogen. Many NEET questions test this subtle distinction. Practicing Part 17 helps students internalize when and why these reactions occur.

Another highly tested concept is acidity trends in carboxylic acids. Questions comparing substituted carboxylic acids based on −I and +I effects appear frequently in NEET. Understanding how electron-withdrawing groups increase acidity is essential. This practice paper reinforces these trends, enabling students to solve comparison-based questions quickly.

Part 17 also builds strong understanding of oxidation and reduction reactions of carbonyl compounds. Distinguishing between mild and strong oxidizing agents, and identifying appropriate reducing agents such as NaBH₄ or LiAlH₄, is essential for exam accuracy. These reaction-based MCQs train students to interpret reagents correctly.

The chapter further introduces students to keto-enol tautomerism, a concept that requires logical reasoning rather than memorization. NEET often frames conceptual questions around α-hydrogen presence, and repeated practice eliminates confusion in this area.

Another important benefit of solving this paper is preparation for multi-step conversion problems. Carbonyl compounds frequently appear as intermediates in organic reaction sequences. Mastery of this chapter significantly improves performance in such questions.

The structured 30-question format enhances speed, concentration, and reaction recall ability. Carbonyl chemistry demands precision, and small conceptual errors can lead to incorrect answers. Practicing a complete set improves exam temperament and decision-making under time pressure.

The instant explanation-based feedback ensures that conceptual gaps are identified immediately. Organic Chemistry builds progressively, and misunderstandings in carbonyl chemistry can affect performance in amines, biomolecules, and polymers. Correcting errors at this stage strengthens the overall organic foundation.

In conclusion, NEET UG Chemistry Practice Paper – Part 17 is a powerful concept-reinforcement and score-optimization tool. It sharpens understanding of carbonyl reactivity, named reactions, acidity trends, qualitative tests, and mechanism-based reasoning. For NEET aspirants aiming to achieve high accuracy and strong Organic Chemistry performance, mastering Aldehydes, Ketones & Carboxylic Acids through structured practice is an essential step toward exam success.

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