Properties of Air and Water NDA Questions

NDA Chemistry

Properties of Air and Water MCQ Questions


1.
Which simple activity demonstrates that air occupies space?
A.
Dissolving salt in water
B.
Pushing an inverted empty glass/tumbler into water and observing that water does not fill it completely
C.
Freezing water in a tray
D.
Heating water in a beaker
😑 View Answer Rough Work Error
ANSWER :
B. Pushing an inverted empty glass/tumbler into water and observing that water does not fill it completely
2.
Air is present everywhere around us, including in the soil, in water and inside living things. This can be shown by dropping a dry piece of a brick or clay into water because:
A.
Bubbles of air escape from the pores of the brick
B.
The brick turns the water blue
C.
The brick dissolves in water
D.
The brick floats without any change
😑 View Answer Rough Work Error
ANSWER :
A. Bubbles of air escape from the pores of the brick
3.
The invisible, gaseous substance that surrounds the Earth and is essential for the survival of living organisms is called:
A.
Soil
B.
Air
C.
Water vapour
D.
Smoke
😑 View Answer Rough Work Error
ANSWER :
B. Air
4.
Which of the following properties of air can be demonstrated by filling an empty balloon?
A.
Air is a liquid
B.
Air has colour
C.
Air occupies space and has weight
D.
Air cannot be compressed
😑 View Answer Rough Work Error
ANSWER :
C. Air occupies space and has weight
5.
Air is a mixture of gases and hence:
A.
It is visible only at high altitudes
B.
It has no fixed composition anywhere on Earth
C.
It has a fixed blue colour
D.
It is invisible, has no definite shape, and takes the shape of its container
😑 View Answer Rough Work Error
ANSWER :
D. It is invisible, has no definite shape, and takes the shape of its container
6.
A cork/piece of paper pushed to the bottom of a bucket of water inside an inverted glass tumbler stays dry. This experiment proves that:
A.
Air occupies space and prevents water from entering the glass
B.
Air dissolves in water
C.
Water pushes air away completely
D.
Paper is waterproof by nature
😑 View Answer Rough Work Error
ANSWER :
A. Air occupies space and prevents water from entering the glass