Question 1Air is a mixture of various gases- One of the gases constitutes 21a Nitrogenb Oxygenc Ozoned Argon

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Standard VIII

Chemistry

How Crucial Is Air and Water?

Question 1Air...

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Question 1
Air is a mixture of various gases. One of the gases constitutes 21% part of the air and is essential for the survival of human beings. This gas is:
(a) Nitrogen
(b) Oxygen
(c) Ozone
(d) Argon

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Solution

The answer is (b).
Oxygen makes up about 21% of air by volume. It is essential for the survival of human beings.

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Similar questions

Question 1
Air is a mixture of various gases. One of the gases constitutes 21% part of the air and is essential for the survival of human beings. This gas is:
(a) Nitrogen
(b) Oxygen
(c) Ozone
(d) Argon

Q. Air is a mixture of various gases. One of the gases is 21% part of the air and is essential for the survival of human beings. This gas is:

Q. (a) Explain how, nitrogen , oxygen and argon gases are separated from air.
(b) Draw a flow diagram of the processes involved in obtaining gases like nitrogen, oxygen and argon from air.

Statement I: Air is a mixture of gases, water vapour and dust particles.

Statement II: Air is composed of only one gas that is nitrogen.

Statement III: Air is composed of two gases, nitrogen and oxygen only.

Which of the above statement is incorrect?

Q. Air has three major components: nitrogen, oxygen, and argon. Given that one mole of air at sea level is mole up of

78

nitrogen,

21

oxygen, and

1

argon, by volume. What is the density of air? Assume that gases behave in an ideal manner. (Atomic mass of argon is

40 a m u

)

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Question 1 Air is a mixture of various gases. One of the gases constitutes 21% part of the air and is essential for the survival of human beings. This gas is: (a) Nitrogen (b) Oxygen (c) Ozone (d) Argon

The answer is (b). Oxygen makes up about 21% of air by volume. It is essential for the survival of human beings.

Question 1
Air is a mixture of various gases. One of the gases constitutes 21% part of the air and is essential for the survival of human beings. This gas is:
(a) Nitrogen
(b) Oxygen
(c) Ozone
(d) Argon

The answer is (b).
Oxygen makes up about 21% of air by volume. It is essential for the survival of human beings.