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Four solutions, namely… (Class 10 Science 2026, Q22)

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

CBSE Class 10 Science 2026: question 22

Set in the CBSE Class 10 board exam of 2026, paper 31/5/1, section B, question 22, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q22 · 1 mark · MCQAcids, Bases and Salts

Four solutions, namely fructose, ethanol, hydrochloric acid and sodium hydroxide filled in four separate beakers are connected one by one in an electric circuit with a bulb. The solutions in which the bulb will glow when current is passed are :

  1. (A)ethanol and hydrochloric acid
  2. (B)fructose and ethanol
  3. (C)fructose and sodium hydroxide
  4. (D)hydrochloric acid and sodium hydroxide

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

Electric current through a solution needs ions.

Hint 2

Which of these substances are acids or bases?

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. HCl and NaOH ionise in water, giving free ions that carry current, so the bulb glows.

    1 mark

  2. Fructose and ethanol do not ionise in water, so the bulb does not glow with them. Answer: (D).

Answer: (D)

Where the marks are

  • Picks the solutions that produce ions (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Acids, Bases and Salts, 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.