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Test: Air Around Us - UPSC


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10 Questions MCQ Test Science & Technology for UPSC CSE - Test: Air Around Us

Test: Air Around Us for UPSC 2023 is part of Science & Technology for UPSC CSE preparation. The Test: Air Around Us questions and answers have been prepared according to the UPSC exam syllabus.The Test: Air Around Us MCQs are made for UPSC 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Air Around Us below.
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Test: Air Around Us - Question 1

The nitrogen content in air is

Detailed Solution for Test: Air Around Us - Question 1

By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases.

The percentage of nitrogen in air is:

Test: Air Around Us - Question 2

The ___________ makes the windmill to rotate.

Detailed Solution for Test: Air Around Us - Question 2

The blowing wind makes the windmill to rotate.

  • The energy in which wind is used to generate electricity is known as wind energy.
  • Wind turbines convert the kinetic energy in the wind into mechanical power.
  • This mechanical power is then used for various purposes.
  • Wind energy is a free and renewable resource. It is a clean and non-polluting source of energy.
Test: Air Around Us - Question 3

Air is a __________ of some gases.

Detailed Solution for Test: Air Around Us - Question 3

Air is a mixture of a number of gases like Nitrogen, Oxygen and Carbon dioxide etc.

Test: Air Around Us - Question 4

A weather cock show the ___________ in which wind is blowing.

Detailed Solution for Test: Air Around Us - Question 4

A weather cock shows the direction in which wind is blowing.

Test: Air Around Us - Question 5

Mountaineers carry oxygen ______________ with them, while climbing mountains.

Detailed Solution for Test: Air Around Us - Question 5

Mountaineers carry Oxygen cylinder with them, while climbing mountains because air pressure is low at higher altitude.

Light - NCERT Class 6 Science

Test: Air Around Us - Question 6

The nose and mouth of traffic police at crossing is covered with

Detailed Solution for Test: Air Around Us - Question 6

The nose and mouth of traffic police at the crossing is covered with masks due to the presence of high pollutants in air.

Observe the picture given in Fig. 15.1 carefully and answer the following  questions.(i) What is covering the nose and mouth of the police man?(ii)  Why is he putting a cover on his

Test: Air Around Us - Question 7

The presence of air around can be proved by

Detailed Solution for Test: Air Around Us - Question 7

The presence of air around can be proved by feeling it when it moves.

Test: Air Around Us - Question 8

The active part of air is

Detailed Solution for Test: Air Around Us - Question 8

The active part of air is Oxygen that help in combustion and respiration.

Test: Air Around Us - Question 9

A gas used for welding purpose is

Detailed Solution for Test: Air Around Us - Question 9

​​​​​​​Gases used in welding and cutting processes are include in shielding gases such as carbon dioxide, argon, helium, etc and fuel gases such as acetylene, propane, butane, etc. oxygen, used with fuel gases and also in small amounts in some shielding gas mixtures.

Test: Air Around Us - Question 10

Which gas is produced on burning of fossil fuels

Detailed Solution for Test: Air Around Us - Question 10

The burning of fossil fuels - like coal, oil and natural gas - releases gases into the air, mainly carbon-dioxide, sulfur dioxide, methane and nitrous oxide.

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