Match List - I with List - II. Reagents and Reaction Name (Involving aldehydes)
Q. Match List - I with List - II.

List – I
Reagents

A. H₂, Pd–BaSO₄
B. SnCl₂, HCl
C. CrO₂Cl₂, CS₂
D. CO, HCl, Anhyd. AlCl₃

List – II
Reaction Name (Involving aldehydes)

I. Etard Reaction
II. Rosenmund Reduction
III. Gattermann–Koch Reaction
IV. Stephen Reaction

Choose the correct answer from the options given below :
A. A-II, B-III, C-IV, D-I
B. A-IV, B-III, C-I, D-II
C. A-IV, B-I, C-II, D-III
D. A-II, B-IV, C-I, D-III
Correct Answer: D

Explanation (Complete Concept Clarity)

A. H₂, Pd–BaSO₄

This is the poisoned catalyst used in Rosenmund reduction. It converts acid chlorides into aldehydes selectively.

Therefore, A → II (Rosenmund Reduction).

B. SnCl₂, HCl

This reagent reduces nitriles to iminium salt which on hydrolysis gives aldehyde. This is Stephen reaction.

Therefore, B → IV (Stephen Reaction).

C. CrO₂Cl₂, CS₂

This reagent oxidizes toluene and substituted toluenes to benzaldehyde. This is Etard reaction.

Therefore, C → I (Etard Reaction).

D. CO, HCl, Anhyd. AlCl₃

This reagent combination is used in formylation of aromatic ring to give aldehyde. This is Gattermann–Koch reaction.

Therefore, D → III (Gattermann–Koch Reaction).

Final Matching:

A-II, B-IV, C-I, D-III

Correct Option: D

Related JEE Main Questions

In a Young's double slit experiment set up, the two slits are kept 0.4 mm apart and screen is placed at 1 m from slits. If a thin transparent sheet of thickness 20 μm is introduced in front of one of the slits then center bright fringe shifts by 20 mm on the screen. The refractive index of transparent sheet is given by α/10, where α is ____.
A diatomic gas (γ = 1.4) does 100 J of work when it is expanded isobarically. Then the heat given to the gas ____ J.
The terminal velocity of a metallic ball of radius 6 mm in a viscous fluid is 20 cm/s. The terminal velocity of another ball of same material and having radius 3 mm in the same fluid will be ____ cm/s.
An electromagnetic wave of frequency 100 MHz propagates through a medium of conductivity, σ = 10 mho/m. The ratio of maximum conduction current density to maximum displacement current density is ____.
A particle having electric charge 3 × 10⁻¹⁹ C and mass 6 × 10⁻²⁷ kg is accelerated by applying an electric potential of 1.21 V. Wavelength of the matter wave associated with the particle is α × 10⁻¹² m. The value of α is ____.

Important for Competitive Exams

jee mains jee advanced iit jee neet chemistry organic chemistry aldehydes and ketones rosenmund reduction stephen reaction etard reaction gattermann koch reaction jee mains chemistry revision iit jee organic chemistry neet preparation chemistry match the following chemistry competitive exam chemistry organic reactions list exam oriented preparation chemistry mcq jee mains preparation jee advanced preparation iit entrance exam neet exam chemistry
Home / Complete JEE Main, JEE Advanced & NEET Study Material – neetjeerankers.com

Updated for JEE Main 2026: This PYQ is important for JEE Mains, JEE Advanced and other competitive exams. Practice more questions from this chapter.

Scroll to Top