Match List-I with List-II
| List-I | List-II |
| (A) Glucose | (I) Aldotriose |
| (B) Glyceraldehyde | (II) Aldohexose |
| (C) Fructose | (III) Ketotriose |
| (D) Dihydroxyacetone | (IV) Ketohexose |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A) - (II), (B) - (I), (C) - (IV), (D) - (III)
(A) Glucose — This matches (II) Aldohexose. Glucose, \( \ce{C6H12O6} \), has six carbons and an aldehyde group at C-1.
\( \displaystyle \ce{CHO-(CHOH)4-CH2OH} \)
(B) Glyceraldehyde — This matches (I) Aldotriose. It has three carbons and an aldehyde group; it is the simplest aldose.
\( \displaystyle \ce{CHO-CHOH-CH2OH} \)
(C) Fructose — This matches (IV) Ketohexose. Fructose, also \( \ce{C6H12O6} \), has six carbons and a ketone group at C-2.
\( \displaystyle \ce{CH2OH-CO-(CHOH)3-CH2OH} \)
(D) Dihydroxyacetone — This matches (III) Ketotriose. It has three carbons with the ketone group in the middle; it is the simplest ketose.
\( \displaystyle \ce{CH2OH-CO-CH2OH} \)
Shortcut: The pair (A)–(II) appears in Options (3) and (4), and (B)–(I) then leaves only Option (4).
NCERT (2026-27 edition):
Monosaccharides
