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An element with atomic… (Class 10 Science SQP 2023-24, Q6)

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

CBSE Class 10 Science sample paper 2023-24: question 6

From the official CBSE sample question paper for 2023-24, 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

An element with atomic number_____ will form a basic oxide.

  1. (A)7 (2,5)
  2. (B)17 (2,8,7)
  3. (C)14 (2,8,4)
  4. (D)11 (2,8,1)

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

Is the oxide of a metal acidic or basic?

Hint 2

Look for the configuration with 1 valence electron.

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 form basic oxides. A metal has few valence electrons (1 to 3) and loses them easily.

  2. The configuration 2,8,1 (atomic number 11) is sodium, a metal, which forms the basic oxide . The other options are non-metals (N, Cl, Si). So the answer is option (D).

    1 mark

Answer: 11 (2,8,1), option (D)

Where the marks are

  • Identifies the metal (2,8,1) as forming a basic oxide (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.