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Important Questions Test: Air Around Us - UPSC MCQ


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

Important Questions Test: Air Around Us for UPSC 2025 is part of Science & Technology for UPSC CSE preparation. The Important Questions Test: Air Around Us questions and answers have been prepared according to the UPSC exam syllabus.The Important Questions Test: Air Around Us MCQs are made for UPSC 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Important Questions Test: Air Around Us below.
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Important Questions Test: Air Around Us - Question 1

Moisture in air is called

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The quantity of water vapour present in air is called as humidity.

Important Questions Test: Air Around Us - Question 2

Finer hair inside the nose

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Finer hairs inside the nose filter the dust particle while inhaling the air.

Important Questions Test: Air Around Us - Question 3

Winnowing is used to separate

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Winnowing is used to separate grains from husk due to difference in their density.

Important Questions Test: Air Around Us - Question 4

The layer of air around the earth surface is called

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The layer of air around the earth surface is called atmosphere.

Important Questions Test: Air Around Us - Question 5

Density of air ____________ with height.

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Density of air decrease with height as we move upwards.

Important Questions Test: Air Around Us - Question 6

Gases and fine dust particle together make the

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Gases and dust particle together make the smoke. Smoke starts from burning substances.

Important Questions Test: Air Around Us - Question 7

Atmospheric pressure _____________ with height.

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Atmospheric pressure decrease with height due to decrease in density of air.

Important Questions Test: Air Around Us - Question 8

Explain the following observations briefly:
An empty glass in fact is not empty.

Detailed Solution for Important Questions Test: Air Around Us - Question 8

The glass which is empty is actually filled with air. And because air takes up space when an empty glass is inverted and inserted into a trough filled with water, the air is trapped within and it is no anyway for air to escape out.

Important Questions Test: Air Around Us - Question 9

The balance between carbon dioxide and oxygen is maintained by

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The balance between carbon dioxide and oxygen is maintained by photosynthesis and respiration in which carbon dioxide and oxygen is used and oxygen and carbon dioxide is produced respectively.

Important Questions Test: Air Around Us - Question 10

Which of the following gas is found in largest quantity in air?

Detailed Solution for Important Questions Test: Air Around Us - Question 10

Nitrogen gas is found in largest quantity in air followed by oxygen gas.

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