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On adding dilute… (Class 10 Science SQP 2023-24, Q4)

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ScienceCBSE Class 10 · Sample paper, session 2023-24 · 1 mark · MCQ

CBSE Class 10 Science sample paper 2023-24: question 4

From the official CBSE sample question paper for 2023-24, section A, question 4, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q4 · 1 mark · MCQMetals and Non-metals

On adding dilute sulphuric acid to a test tube containing a metal 'X', a colourless gas is produced when a burning match stick is brought near it. Which of the following correctly represents metal 'X'?

  1. (A)Sodium
  2. (B)Sulphur
  3. (C)Copper
  4. (D)Silver

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2023-24.

Hints

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

Hint 1

Which gas burns with a pop sound?

Hint 2

Only metals above hydrogen in the reactivity series displace it from acids.

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. A colourless gas that burns with a pop near a burning match stick is hydrogen. Hydrogen forms when a metal above hydrogen in the reactivity series reacts with a dilute acid.

  2. Sulphur is a non-metal. Copper and silver lie below hydrogen and do not give . Sodium does: . So the answer is option (A).

    1 mark

Answer: Sodium, option (A)

Where the marks are

  • Identifies sodium as the metal that liberates hydrogen with dilute acid (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Metals and Non-metals, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2023-24: 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.