Colour of Air

Q.

Why is air invisible to us?

1. Air allows all the light that falls on it to pass through it.

2. Some constituents of air absorb light rays that fall on it.

3. Air traps all the light that falls on it.

4. Air reflects all the light that falls on it.

Q.

Air cannot be seen through naked eyes. True/False

1. True

2. False

Q. Differentiate among opaque, translucent and transparent materials, giving one example of each.​

Q.

Air cannot be seen through naked eyes.

1. True

2. False

Q. A molecule of water is made up of
(a) atoms of water.
(b) atoms of hydrogen.
(c) atoms of oxygen.
(d) atoms of hydrogen and oxygen.

Q. Which of these constituents of air is required by living things but cannot be taken directly from the atmosphere?
(a) oxygen
(b) nitrogen
(c) carbon dioxide
(d) all of these

Q. What kind of objects/materials are transparent?

1. Anything that reflects all the light that falls on it is transparent
2. Anything that allows all the light falling on it to pass through them, is transparent.
3. Anything that absorbs all the light that falls on it is transparent.
4. Anything that traps all the light that falls on it is transparent.

Q.

Oxygen is found as a __________ molecule.

1. Diatomic

2. Triatomic

3. Monoatomic

4. Tertiary

Q. How is a translucent object different from a transparent object?

Q. Match the following objects with their property.

1. Transparent
2. Translucent
3. Opaque

Q. What kind of objects/materials are transparent?

1. Anything that allows all the light that falls on it to pass through, is transparent.
2. Anything that absorbs all the light that falls on it is transparent.
3. Anything that traps all the light that falls on it is transparent.
4. Anything that reflects all the light that falls on it is transparent

Q. Why do you think air is transparent?

1. Some constituents of air absorb light rays that fall on them.
2. Air traps all the light that falls on it.
3. Air allows all the light that falls on it to pass through.
4. Air reflects all the light that falls on it.