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A metal, 'X', on treatment… (Class 10 Science 2025, Q4)

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ScienceCBSE Class 10 · Board exam 2025, set 31/5/1 · 1 mark · MCQ

CBSE Class 10 Science 2025: question 4

Set in the CBSE Class 10 board exam of 2025, paper 31/5/1, 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

A metal, 'X', on treatment with sodium hydroxide liberates a gas 'G'. It also liberates the same gas, 'G' on treatment with dilute sulphuric acid. Based on above information, 'X' and 'G' respectively are

  1. (A)Copper and Sulphur dioxide
  2. (B)Zinc and Sulphur dioxide
  3. (C)Zinc and Hydrogen
  4. (D)Copper and Hydrogen

Source: official question paper from cbse.gov.in (PDF). See it in the full 2025 board paper, set 31/5/1.

Hints

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

Hint 1

Which of these metals reacts with both acids and bases?

Hint 2

Metals usually release the same gas from both an acid and a base. Which gas is it?

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. Zinc reacts with both a base and an acid to give hydrogen: and .

  2. Copper does not react with either reagent, so X is zinc and G is hydrogen: option (C).

    1 mark

Answer: (C) Zinc and Hydrogen

Where the marks are

  • Chooses zinc and hydrogen (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 paper2025 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.