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NEET CHEMISTRYAldehydes, Ketones and Carboxylic AcidsMedium

Question

Match List-I with List-II.

List-I (Substrates/Reagents) (a) R−CO−CH3R-CO-CH_3 (b) Benzene, COCO, HClHCl, Anhyd. AlCl3AlCl_3 (c) R−CH2−COOHR-CH_2-COOH, X2X_2/Red P (d) R−COOH+R′OHR-COOH + R'OH, H+H^+

List-II (Name of reactions) (i) Hell-Volhard-Zelinsky reaction (ii) Gattermann-Koch reaction (iii) Haloform reaction (iv) Esterification

Choose the correct answer from the options given below:

A

(a)-(i), (b)-(iv), (c)-(iii), (d)-(ii)

B

(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

C

(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)

D

(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)

Step-by-Step Solution

(a) Compounds containing a methyl ketone group (R−CO−CH3R-CO-CH_3) undergo the Haloform reaction when treated with sodium hypohalite (NaOXNaOX). (b) Benzene reacts with COCO and HClHCl in the presence of anhydrous AlCl3AlCl_3 or CuClCuCl to form benzaldehyde. This is known as the Gattermann-Koch reaction. (c) Carboxylic acids having an lpha-hydrogen (R−CH2−COOHR-CH_2-COOH) undergo halogenation at the lpha-position when treated with Cl2Cl_2 or Br2Br_2 in the presence of red phosphorus to give lpha-halocarboxylic acids. This is the Hell-Volhard-Zelinsky (HVZ) reaction. (d) Carboxylic acids (R−COOHR-COOH) react with alcohols (R′OHR'OH) in the presence of an acid catalyst to form esters. This process is called Esterification.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Aldehydes, Ketones and Carboxylic Acids. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYAldehydes, Ketones and Carboxylic Acidslistiisubstratesreagentsbenzenerchcoohlistii

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