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Consider the following… (Class 10 Science 2024, Q16)

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ScienceCBSE Class 10 · Board exam 2024, set 31/3/1 · 1 mark · MCQ

CBSE Class 10 Science 2024: question 16

Set in the CBSE Class 10 board exam of 2024, paper 31/3/1, section A, question 16, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q16 · 1 mark · MCQOur Environment

Consider the following statements about ozone :
(a) Ozone is poisonous gas.
(b) Ozone shields the earth's surface from the infrared radiation from the sun.
(c) Ozone is a product of UV radiations acting on oxygen molecule.
(d) At the lower level of the earth's atmosphere, ozone performs most essential function.
The correct statements are

  1. (A)(a) and (b)
  2. (B)(a) and (c)
  3. (C)(b) and (c)
  4. (D)(b) and (d)

Source: official question paper from cbse.gov.in (PDF). See it in the full 2024 board paper, set 31/3/1.

Hints

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

Hint 1

Which type of radiation does the ozone layer block?

Hint 2

Where in the atmosphere is the ozone layer useful?

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) True: ozone is a deadly poison. (c) True: UV radiation splits into O atoms, which combine with to form .

  2. (b) False: ozone absorbs ultraviolet radiation, not infrared. (d) False: ozone's essential function is in the upper atmosphere. The answer is (a) and (c), option (B).

    1 mark

Answer: (a) and (c), option (B)

Where the marks are

  • Identifies (a) and (c) as correct (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Our Environment, one at a time, marked against the answer key and marking points.Back to the full paper2024 board paper, set 31/3/1: 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.