JEE Main · Chemistry ↓ Falling

Biomolecules appeared 36 times across 3 years — 4.2% of Chemistry. This question is from Vitamins Classification.

Year 2026 2025 2024 Total
Questions 9 19 8 36

Fat soluble vitamins are: A. Vitamin B₁ B. Vitamin C C. Vitamin E D. Vitamin B₁₂ E. Vitamin K Choose the correct answer from the options given below :

Solution & Explanation

Related Formula

Vitamins are classified into two categories based on solubility:

  • Water-soluble: Vitamin B-complex and Vitamin C.
  • Fat-soluble: Vitamins A, D, E, and K.
Core Logic

Categorize each given vitamin:

  • Vitamin B₁ (Thiamine) arrow Water-soluble
  • Vitamin C (Ascorbic acid) arrow Water-soluble
  • Vitamin E (Tocopherol) arrow Fat-soluble
  • Vitamin B₁₂ (Cobalamin) arrow Water-soluble
  • Vitamin K (Phylloquinone) arrow Fat-soluble
Step 1: Select correct options

Only C (Vitamin E) and E (Vitamin K) are fat-soluble. Thus, the correct option is (4).

Pattern Recognition

Use the mnemonic 'ADEK' to remember the fat-soluble vitamins. All other vitamins (mainly B-complex and C) are water-soluble.

Chapter Mix

Class 12 Chemistry: Biomolecules

Reference Study Guides

More Biomolecules Previous-Year Questions — Page 8

Q78 jee_main_2024_31_jan_morning Reactions of Glucose
Match List I with List II
LIST-ILIST-II
A. Glucose/NaHCO₃/ΔI. Gluconic acid
B. Glucose/HNO₃II. No reaction
C. Glucose/HI/ΔIII. n-hexane
D. Glucose/Bromine waterIV. Saccharic acid
Choose the correct answer from the options given below:
  • A. A-IV, B-I, C-III, D-II
  • B. A-II, B-IV, C-III, D-I
  • C. A-III, B-II, C-I, D-IV
  • D. A-I, B-IV, C-III, D-II

Solution

Core Logic

Matching the reactions of glucose: (A) Glucose does not react with NaHCO₃, so there is no reaction. (A arrow II) (B) Oxidation of glucose with strong oxidizing agents like HNO₃ yields a dicarboxylic acid called saccharic acid. (B arrow IV) (C) Prolonged heating of glucose with HI forms n-hexane, indicating a straight chain of six carbon atoms. (C arrow III) (D) Oxidation with mild agents like bromine water converts glucose to gluconic acid. (D arrow I)

Chapter Mix

Class 12 Chemistry: Biomolecules

More Biomolecules Questions — jee_main_2025_03_april_evening

Practice all Biomolecules previous-year questions →

Rankbit System
JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%) | JEE Physics: Waves (+15.5%) | Electrostatics: Concentric Shells (-29.7%) | Modern Physics: Photoelectric Clones (+34.2%) | Mathematics: Definite Integrals (+18.1%) | Chemistry: Coordination Splitting (-11.4%)