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The metals obtained from their… (Class 10 Science 2025, Q6)

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

CBSE Class 10 Science 2025: question 6

Set in the CBSE Class 10 board exam of 2025, paper 31/1/1, section A, question 6, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q6 · 1 mark · MCQMetals and Non-metals

The metals obtained from their molten chlorides by the process of electrolytic reduction are :

  1. (A)Gold and silver
  2. (B)Calcium and magnesium
  3. (C)Aluminium and silver
  4. (D)Sodium and iron

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

Hints

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

Hint 1

Which metals are too reactive to be reduced by carbon?

Hint 2

Both metals in the correct option must be highly reactive.

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. Metals at the top of the reactivity series (Na, K, Ca, Mg, Al) cannot be reduced by carbon. They are obtained by electrolysis of their molten compounds.

  2. Calcium and magnesium are extracted by electrolysis of their molten chlorides. Gold, silver and iron are less reactive and are extracted by other methods. The answer is option (B).

    1 mark

Answer: Calcium and magnesium, option (B)

Where the marks are

  • Chooses option (B) (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 31/1/1: 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.