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प्रश्न
What is mass ?
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उत्तर
Mass is the quantity of matter contained in the body.
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संबंधित प्रश्न
What happens to water if it is heated and Explain the phenomenon of change of state of water.
What is volume ?
Water cycle is an example of inter conversion of states of water. Explain.
Give reason for the following.
Pure substances have fixed melting or boiling points.
Fill in the blank:
The temperature at which a liquid boils is called the................. point of that liquid.
Write whether the following statement is true or false.
Intermolecular force of attraction is greater in gases than in liquids.
Match the following
| Column A | Column B |
| (a) Solids | (1) Can flow in all directions. |
| (b) Sublimation | (2) The temperature at which a liquid changes into its gaseous state. |
| (c) Boiling point | (3) Any number of free surfaces. |
| (d) Gases | (4) Gaps between particles. |
| (e) Intermolecular space | ro(5) Change of state fm solid to gas. |
Fill in the blank:
The quantity of matter in an object is called its _____
A piece of chalk can be broken into small particles by hammering but a piece of iron cannot be taken into small particles by hammering. Which characteristic of the particles of matter is illustrated by these observations?
You are provided with a mixture of naphthalene and ammonium chloride by your teacher. Suggest an activity to separate them with well labelled diagram.
