CBSE JEE Main & Advanced Chemistry: Aldehyde And Ketone Important Questions & Complete Chapter Notes
Published: October 20, 2026
Author: NEET & JEE STUDY HUB
🎯 Curriculum & Exam Overview
Comprehensive chapter breakdown covering core theoretical principles, foundational laws, and structured step-by-step problem-solving methods strictly aligned with the updated 2026-27 curriculum.
1. 📚 Quick Revision Notes & Core Theory
1
Strict adherence to NCERT definitions, standard SI units, and official notation.
2
Multi-step conceptual derivation from fundamental postulates to advanced applications.
3
High-frequency board-pattern problem classifications and key diagnostic steps.
⚡ High-Yield Formula & Reaction Sheet
- Primary Governing Equation: Verify dimensions and stoichiometry across both sides.
- Proportionality & Limiting Conditions: Identify critical boundary states and constants.
⚠️ Common Board Trap Alert
Watch out for unit conversions (e.g. cm to meters, Celsius to Kelvin) and sign conventions in directional calculations.
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3. 📝 Interactive Chapter DPP & Practice Questions
Question 1 • MCQ
🔥 MHT CET (2023)
4 Mark(s)
Which of the following reagents is used in Gatterman-Koch formylation of arene?
(A) $\mathrm{CrO}_3$
(B) $\mathrm{CO}, \mathrm{HCl} / \mathrm{AlCl}_{3~(\mathrm{anhydr}.)}$
(C) $\mathrm{CrO}_2 \mathrm{Cl}_2, \mathrm{CS}_2$
(D) $\mathrm{Cl}_2 \mathrm{~h} v, \mathrm{H}_3 \mathrm{O}^{+}$
💡 View Step-by-Step Solution & Answer Key
Correct Answer: (b)
Explanation: Gatterman-Koch formylation of arene involves treatment of benzene or substituted benzene under high pressure with carbon monoxide and hydrogen chloride gives benzaldehyde or substituted benzaldehyde. The reaction is carried out in presence of anhydrous aluminium chloride or cuprous chloride.
Question 2 • MCQ
🔥 MHT CET (2025)
4 Mark(s)
Benzonitrile on reduction with stannous chloride in presence of hydrochloric acid followed by acid hydrolysis forms,
(A) Benzal chloride
(B) Benzoyl chloride
(C) Benzophenone
(D) Benzaldehyde
$
$
💡 View Step-by-Step Solution & Answer Key
Correct Answer: (d)
Explanation: 
$ \text { This reaction is called Stephen reaction. } $
Question 3 • MCQ
🔥 COMEDK (2023)
4 Mark(s)
Which one of the following compounds would not undergo Aldol condensation?
(A) Phenyl ethanal
(B) 1- Phenyl propanone.
(C) 2,2-Dimethyl butanal
(D) 2- Methyl pentanal
💡 View Step-by-Step Solution & Answer Key
Correct Answer: (c)
Explanation: ---
Question 4 • MCQ
🔥 TS EAMCET (2022)
4 Mark(s)
In the following compounds, the ones that give positive iodoform test are
(A) I, II and III
(B) II, III and V
(C) IV, V and VI
(D) II, IV and VI
💡 View Step-by-Step Solution & Answer Key
Correct Answer: (d)
Explanation: Positive iodoform test is given by the compounds which contain the following unit
Out of given compounds, following compounds contain these units
Hence, compound II, IV and VI gives positive iodoform test.
Question 5 • MCQ
🔥 MHT CET (2024)
4 Mark(s)
Identify the product 'B' in the following reaction.
Ethylphenyl ketone $\xrightarrow{\mathrm{H}_2 \mathrm{~N}-\mathrm{NH}_2}$ A $\xrightarrow[\Delta]{\mathrm{KOH}, \mathrm{HO}\left(\mathrm{CH}_2\right)_2 \mathrm{OH}}$ B
(A) Phenylhydrazone
(B) Ethylbenzene
(C) n-propylbenzene
(D) Isopropylbenzene
💡 View Step-by-Step Solution & Answer Key
Correct Answer: (c)
Explanation: 
4. ❓ Frequently Asked Questions (Exam Strategy)
❓ What are the most scoring topics in CBSE JEE Main & Advanced Chemistry: Aldehyde And Ketone Important Questions & Complete Chapter Notes?
Direct formula applications, NCERT exemplar problem types, and standard step-by-step derivations carry the highest mark density.
❓ How should I revise CBSE JEE Main & Advanced Chemistry: Aldehyde And Ketone Important Questions & Complete Chapter Notes for upcoming exams?
First master the core definitions and formula sheet, then solve 10-15 authentic PYQs with timed condition constraints.
❓ Are step-by-step solutions included in this question bank?
Yes, every question includes complete transparent reasoning, correct answer keys, and speed shortcuts.
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