Air is a mixture of: - Vidyadip

MCQ

Air is a mixture of:

A
Nitrogen, oxygen, methane, carbon dioxide.
✓
Nitrogen, oxygen, carbondioxide, water vapours.
C
Nitrogen, carbon dioxide, oxygen, carbon monoxide.
D
Nitrogen, oxygen, carbon monoxide, water vapours.

✓

Answer

Correct option: B.

Nitrogen, oxygen, carbondioxide, water vapours.

Air contains $78\%$ nitrogen,$ 21\%$ oxygen$, 0.004\%$ of carbon dioxide and small percentage of other gases. Amount of water vapour in the air varies with temperature. At $30$ degree Celsius, air can contain $4\%$ of water vapour, whereas at $-40$ degree Celsius, air cannot hold more than $0.2\%$ water vapour.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q. [1 M]" from Natural Resources→Natural Resources — all question types→Science STD 9 question papers→Gujarat Board STD 9 question papers→Gujarat Board question paper generator→

Similar questions

Which of the following is parasitic protozoan?

Delay in the observation of onion cells can lead to:

Elements having valency ‘one’ are:

When two bodies moves uniformly towards each her then they cross each other at the speed of 10m/s. If both the bodies move in the same direction, then they cross each other at the speed of 6m/s. The speed of both bodies are:

A liquid is found to scatter a beam of light but leaves no residue when passed through the filter paper. The liquid can be described as:

A sprinter has to cover a total run of $100\ m$. She increases her speed from rest under a uniform acceleration of $1.0m/s^2$ up to three quarters of the total run and covers the last quarter him uniform speed. The time she takes to cover the first half, and to cover the second half of the run will be.

Rhythmic contraction and relaxation throughout life, are shown by

Set up an experiment to measure gain and loss of heat by water, sand arld air.

Larger the amplitude$, ........$ is the sound:

The end of a long bone is connected to another bone by: