Skip to content

NEET-UG and JEE Main Chemistry · Class 12

Carbohydrate classification; glucose and fructose — NEET & JEE Questions

Carbohydrate classification; glucose and fructose is a topic in Biomolecules, a Class 12 Chemistry chapter of the NEET-UG and JEE Main syllabus. TestBudy holds 12 published NEET-UG and JEE Main questions on Carbohydrate classification; glucose and fructose, each with the marking scheme of the real paper.

questions
12
shown here
10
Test me on this topic

Five free tests with an account. Your score comes with the result; where you stand is Pro.

Carbohydrate classification; glucose and fructose MCQs with solutions

10 of the 12 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.

  1. Question 1 · difficulty L1 · recall

    Glucose is classified as a

    • A. aldohexose
    • B. ketohexose
    • C. aldopentose
    • D. ketopentose

  2. Question 2 · difficulty L2 · understanding

    Fructose is classified as a

    • A. ketohexose
    • B. aldohexose
    • C. aldotriose
    • D. ketopentose

  3. Question 3 · difficulty L2 · understanding

    Monosaccharides are carbohydrates that

    • A. cannot be hydrolysed to simpler carbohydrates
    • B. always contain exactly six carbons
    • C. are all non-reducing
    • D. are all disaccharides

  4. Question 4 · difficulty L2 · understanding

    Glucose and fructose have the same molecular formula but different functional-group arrangement. They are therefore

    • A. functional isomers
    • B. identical compounds
    • C. enantiomers only
    • D. polymers

  5. Question 5 · difficulty L3 · application

    Which carbohydrate is an aldose?

    • A. Glucose
    • B. Fructose
    • C. Sucrose
    • D. Starch

  6. Question 6 · difficulty L3 · application

    Which carbohydrate is a ketose?

    • A. Fructose
    • B. Glucose
    • C. Galactose
    • D. Ribose

  7. Question 7 · difficulty L3 · application

    A six-carbon monosaccharide with an aldehyde group in its open-chain form is classified as

    • A. aldohexose
    • B. ketohexose
    • C. aldopentose
    • D. disaccharide

  8. Question 8 · difficulty L3 · application

    A six-carbon monosaccharide with a ketone group in its open-chain form is classified as

    • A. ketohexose
    • B. aldohexose
    • C. ketopentose
    • D. polysaccharide

  9. Question 9 · difficulty L4 · application

    Which pair correctly matches carbohydrate and class?

    • A. Glucose—aldohexose; fructose—ketohexose
    • B. Glucose—ketohexose; fructose—aldohexose
    • C. Both—aldopentose
    • D. Both—disaccharides

  10. Question 10 · difficulty L4 · application

    A carbohydrate sample cannot be hydrolysed to a simpler sugar and has six carbon atoms. Which classification is certain from this information?

    • A. Monosaccharide hexose
    • B. Disaccharide
    • C. Polysaccharide
    • D. Ketohexose specifically

Common mistakes in Carbohydrate classification; glucose and fructose

Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.

  • Assumes only compounds initially containing aldehyde groups can behave as reducing sugars under test conditions.
  • Uses molecular formula alone and ignores the aldose/ketose distinction.

Practise this chapter

Reading a question and answering it under a clock are different things. A chapter-length test measures whether the topic went in.

Biomolecules questions and mock test 256 questions

Chemistry mock tests for NEET-UG and JEE Main

Start a free diagnostic on Biomolecules