Skip to content

In the given experimental… (Class 10 Science 2023, Q2)

questionbuddy.in/q/cbse-10-science-2023-31-2-1-q2-experimental-set-experiment-carried-out

ScienceCBSE Class 10 · Board exam 2023, set 31/2/1 · 1 mark · MCQ

CBSE Class 10 Science 2023: question 2

Set in the CBSE Class 10 board exam of 2023, paper 31/2/1, section A, question 2, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q2 · 1 mark · MCQAcids, Bases and Salts

In the given experimental set-up, if the experiment is carried out separately with each of the following solutions the cases in which the bulb will glow is/are :
(i) Dilute hydrochloric acid
(ii) Dilute sulphuric acid
(iii) Glucose solution
(iv) Alcohol

  1. (A)(i) only
  2. (B)(ii) only
  3. (C)(i) and (ii)
  4. (D)(ii), (iii) and (iv)

Figure in the paper: A battery (marked + and -) in series with a bulb and a switch, connected by wires to two electrodes dipped into a beaker containing a solution. The bulb is shown glowing. The label 'Solution' points to the liquid in the beaker. See it in the official paper.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2023 board paper, set 31/2/1.

Hints

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

Hint 1

The bulb glows only if ions are present in the solution.

Hint 2

Which of the substances are acids that give H ions?

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. Dilute HCl and dilute HSO produce H ions in water, so they conduct electricity and the bulb glows.

    1 mark

  2. Glucose and alcohol do not ionise in water, so they do not conduct and the bulb does not glow.

Answer: (C) (i) and (ii)

Where the marks are

  • Identifies the two acids as conductors (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 paper2023 board paper, set 31/2/1: 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.