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प्रश्न
What do you mean by the change of state of matter?
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उत्तर
The change in the state of matter of a substance from solid to liquid or from liquid to gas is brought by imparting heat energy to it at a constant temperature.
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संबंधित प्रश्न
Water at 100°C has more heat than the steam at 100°C.
Fill in the blank
The gases are .......... dense.
How do the solids, liquids, and gases differ in their following properties.
(a) Size
(b) Shape
(c) Density
Give the molecular model for a solid and use it to explain why a solid has a definite volume and a definite shape.
Give a reason for the Pure substances have fixed melting or boiling points.
Give reason :
Why do liquids and gases flow but solids do not?
Fill in the blank
Water is a matter because it has ............ and occupies ............
Write whether the following statement is true or false
All solids, on heating, first change to the liquid and then to the gaseous state always.
What are the two main types of matter?
State the property of the following substance.
Hydrogen sulphide gas has a strong rotten egg odour.
