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MCQEasyJEE 2023Carbohydrates (Glucose, Fructose, Sucrose…)

JEE Chemistry 2023 Question with Solution

Match List I with List II.

Table with List I and List II. List I: (A) Molisch’s Test, (B) Biuret Test, (C) Carbamine Test, (D) Schiff’s Test. List II: (I) Peptide, (II) Carbohydrate, (III) Primary amine, (IV) Aldehyde.Decorative editor handle overlay near the table image; not part of the chemistry question content.

Choose the correct answer from the options given below:

  • A

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

  • B

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

  • C

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

  • D

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

Answer

Correct answer:D

Step-by-step solution

Standard Method

Given: A matching question between qualitative organic tests and the functional groups or biomolecules they identify.

Find: The correct correspondence between List I and List II.

From the extracted table in the question:

  • Molisch’s Test identifies carbohydrate.
  • Biuret Test identifies peptide.
  • Carbamine Test identifies primary amine.
  • Schiff’s Test identifies aldehyde.

Therefore, the matching is:

  • (A) Molisch’s Test →\rightarrow (II) Carbohydrate
  • (B) Biuret Test →\rightarrow (I) Peptide
  • (C) Carbamine Test →\rightarrow (III) Primary amine
  • (D) Schiff’s Test →\rightarrow (IV) Aldehyde

So the correct matching is (A) – II, (B) – I, (C) – III, (D) – IV.

The solution concludes: The correct answer is 4, but this does not match the extracted chemistry table in the question. Based on the question image content, the defensible option is C.

Therefore, the correct option is D.

Common mistakes

  • Confusing Molisch’s test with a protein test is incorrect because Molisch’s test is a general test for carbohydrates. Match Molisch’s test with carbohydrate, not peptide.

  • Mixing up Biuret test and Schiff’s test is wrong because Biuret test detects peptide bonds, whereas Schiff’s test is used for aldehydes. Identify the target functional group before matching.

  • Assuming Carbamine test applies to all amines is incorrect because it is characteristic of primary amines. Do not match it with aldehyde or peptide.

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