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Which of the following will… (Class 10 Science 2026, Q21)

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ScienceCBSE Class 10 · Board exam 2026, set 31/5/1 · 1 mark · MCQ

CBSE Class 10 Science 2026: question 21

Set in the CBSE Class 10 board exam of 2026, paper 31/5/1, section B, question 21, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q21 · 1 mark · MCQCarbon and its Compounds

Which of the following will not undergo addition reaction ?

  1. (A)
  2. (B)
  3. (C)
  4. (D)

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 31/5/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

Addition reactions need a double or triple bond.

Hint 2

Find the compound that fits .

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. (propane) is a saturated alkane with only single bonds, so it cannot undergo an addition reaction.

    1 mark

  2. The other three compounds have double or triple bonds and do undergo addition. Answer: (C).

Answer: (C) C₃H₈

Where the marks are

  • Identifies the saturated hydrocarbon (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Carbon and its Compounds, one at a time, marked against the answer key and marking points.Back to the full paper2026 board paper, set 31/5/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.