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Standard IX

Chemistry

Ozone Layer

Study the fol...

Question

Study the following statements about ozone:

(a) It is essential for breathing of living organisms.

(b) It is used to disinfect water.

(c) It absorbs ultraviolet rays.

(d) Its proportion in air is about 3%.

Which of these statements are correct?

(a), (b) and (c)

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(b) and (c)

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(a) and (d)

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All four

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Solution

The correct option is B (b) and (c)
Ozone is a chemical used to disinfect water. The ozone layer is a layer that protects us from the harmful ultraviolet rays coming from the sun.

Therefore, (b) and (c) are correct here. Hence, option B is the right answer.

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Similar questions

Which of the following statement about ozone is correct?

(a) It is essential for breathing.

(b) It absorbs ultraviolet rays.

(d) It is mainly responsible for global warming.

Which of the following statements is/are correct about breathing?

Statement 1 - Breathing is a voluntary process.

Statement 2 - Breathing is a physical process.

Statement 3 - It is known as external respiration.

Statement 4 - Breathing is same as respiration.

Which of the following statements is true about $C a (O H)_{2}$
(a) it is used in the prreparation of bleacing powder
(b) It is a light blue solid
(c) It does nnot possess disinfectant property
(d) It is used in the manufacture fo cement

Q. A, B and C are three living organisms. The organism A is a unicellullar fungus which can live without air. It is used in the commercial production of an organic compound P from molasses. The organism B is a unicellular animal which lives in water and feeds and moves by using pseudopodia. It breathes through an organelle Q. The organism C is a tiny animal which acts as a carrier of malarial parasite. It breathes and respires through a kind of tiny holes R and air-tubes S in its body.
(a) What are organisms (i) A (ii) B, and (iii) C?
(b) Name (i) P (ii) Q (iii) R, and (iv) S.
(c) Which organism/organisms undergo aerobic respiration?
(d) Which organism/organisms undergo anaerobic respiration?

Q. Assertion (A): Stratospheric ozone layer plays a vital role in protecting the living organisms on Earth.
Reason (R): It acts as a shield by absorbing ultraviolet radiation from the sun.

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Ozone Layer

Standard IX Chemistry

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Study the following statements about ozone: ​ (a) It is essential for breathing of living organisms. ​ (b) It is used to disinfect water. ​ (c) It absorbs ultraviolet rays. ​ (d) Its proportion in air is about 3%. ​ Which of these statements are correct?

The correct option is B (b) and (c)Ozone is a chemical used to disinfect water. The ozone layer is a layer that protects us from the harmful ultraviolet rays coming from the sun.​ ​Therefore, (b) and (c) are correct here. Hence, option B is the right answer.​ ​

Study the following statements about ozone:

(a) It is essential for breathing of living organisms.

(b) It is used to disinfect water.

(c) It absorbs ultraviolet rays.

(d) Its proportion in air is about 3%.

Which of these statements are correct?

The correct option is B (b) and (c)
Ozone is a chemical used to disinfect water. The ozone layer is a layer that protects us from the harmful ultraviolet rays coming from the sun.

Therefore, (b) and (c) are correct here. Hence, option B is the right answer.