Name: Change of State of Matter
Uploaded: 2019-07-19
Duration: 4 min 36 s
Description: Have you thought about the reason behind the dew formation on the grass in the morning? Let's learn more about the change of state of matter in this video.

Question

Match the following :

Column A	Column B
(a) A molecule is	(i) does not exist free in composed of nature.
(b) Ice, water and	(ii) can vibrate only up to water vapour about $10^{- 10} m$ from their mean positions.
(c) An atom	(iii) atoms.
(d) Gases	(iv) are the three states of water.
(e) The molecules of a solid	(v) occupy space

Accepted Answer

(a) A molecule is - (iii) atoms.

Matter is composed of a very large number of tiny particles known as atoms. A molecule is made up of one or more than one atoms of the same kind or of different kinds.

(b) Ice, water and water vapour - (iv) are the three states of water.

Water can exist in all the three states, ice (solid state), water (liquid state) and steam (gaseous state).

(c) An atom - (i) does not exist free in composed of nature.

Most of the atoms cannot exist freely in nature. A molecule can exist freely in nature.

(d) Gases - (v) occupy space

There is a negligible force of attraction between the molecules of a gas, so they are free to move in the entire space available to them.

(e) The molecules of a solid - (ii) can vibrate only up to water vapour about $10^{- 10} m$ from their mean positions.

The molecules of a solid can vibrate only up to water vapour about $10^{- 10} m$ from their mean positions.

The molecules vibrate on either side of their mean positions but they do not leave their positions. Therefore, solids have a definite size.

Column A Column B

(a) A molecule is (iii) atoms.

(b) Ice, water and water vapour (iv) are the three states of water.

(c) An atom (i) does not exist free in composed of nature.

(d) Gases (v) occupy space

(e) The molecules of a solid (ii) can vibrate only up to water vapour about $10^{- 10} m$ from their mean positions.

Important Questions on Matter

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