Q.67. Match List-I with List-II.
List-I: Mixture of Compounds
A. Diethyl amine + Ethyl amine
B. Acet

Q: What is the correct answer for this exam Chemistry Q67?

The correct answer is D. Sol. Let's match each mixture with the appropriate distinguishing reagent: A. Diethyl amine + Ethyl amine: Diethyl amine is a secondary amine (2° amine). Ethyl amine is a primary amine (1° amine). Hinsberg's test (reaction with benzenesulfonyl chloride) can distinguish 1°, 2°, and 3° amines. However, among the given options, the carbylamine test (reaction with CHCl₃ + KOH, $\Delta$) is specific f

Q: Q.67. Match List-I with List-II. List-I: Mixture of Compounds A. Diethyl amine + Ethyl amine B. Acetaldehyde + Acetone C. Ethanol + Phenol D. Benzoic acid + Cinnamic acid List-II: Reagent used to…

The correct answer is D. Sol. Let's match each mixture with the appropriate distinguishing reagent: A. Diethyl amine + Ethyl amine: Diethyl amine is a secondary amine (2° amine). Ethyl amine is a primary amine (1° amine). Hinsberg's test (reaction with benzenesulfonyl chloride) can distinguish 1°, 2°, and 3° amines. However, among the given options, the carbylamine test (reaction with CHCl₃ + KOH, $\Delta$) is specific f

Q: What are the options for this this exam Chemistry question?

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

Question

Q.67. Match List-I with List-II.
List-I: Mixture of Compounds
A. Diethyl amine + Ethyl amine
B. Acetaldehyde + Acetone
C. Ethanol + Phenol
D. Benzoic acid + Cinnamic acid
List-II: Reagent used to distinguish
I. Bromine water
II. CHCl₃ + KOH, 
III. Neutral FeCl₃
IV. Ammonical silver nitrate
Choose the correct answer from the options given below:

FirstInTest · Accepted Answer

Sol. Let's match each mixture with the appropriate distinguishing reagent:

A. Diethyl amine + Ethyl amine:
Diethyl amine is a secondary amine (2° amine). Ethyl amine is a primary amine (1° amine).
Hinsberg's test (reaction with benzenesulfonyl chloride) can distinguish 1°, 2°, and 3° amines. However, among the given options, the carbylamine test (reaction with CHCl₃ + KOH, $\Delta$) is specific for primary amines (1° amines), producing an offensive smell (isocyanide). Secondary amines do not give this test. So, CHCl₃ + KOH, $\Delta$ (II) can distinguish them.
Match A - II.

B. Acetaldehyde + Acetone:
Acetaldehyde is an aldehyde, and acetone is a ketone. Aldehydes give positive tests with Tollens' reagent (ammonical silver nitrate) and Fehling's/Benedict's solution, while ketones generally do not (unless they are alpha-hydroxy ketones). Ammonical silver nitrate (Tollens' reagent) (IV) will give a silver mirror with acetaldehyde but not with acetone. So, Ammonical silver nitrate (IV) can distinguish them.
Match B - IV.

C. Ethanol + Phenol:
Phenol is an aromatic alcohol with an acidic proton, which reacts with neutral ferric chloride (FeCl₃) to give a characteristic violet coloration due to the formation of a colored complex. Ethanol (an aliphatic alcohol) does not give this test. So, Neutral FeCl₃ (III) can distinguish them.
Match C - III.

D. Benzoic acid + Cinnamic acid:
Benzoic acid is an aromatic carboxylic acid. Cinnamic acid is an unsaturated aromatic carboxylic acid (contains a C=C double bond). Bromine water (I) is used to test for unsaturation. Cinnamic acid will decolorize bromine water due to the addition reaction across the double bond, while benzoic acid will not. So, Bromine water (I) can distinguish them.
Match D - I.

Combining the matches:
A - II
B - IV
C - III
D - I

Let's check the options:
(1) A-IV, B-II, C-I, D-III
(2) A-IV, B-II, C-III, D-I
(3) A-II, B-IV, C-I, D-III
(4) A-II, B-IV, C-III, D-I - This matches our derived order.

Answer

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

Answer

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

Answer

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

Answer

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

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