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प्रश्न
What are fluids? Give two examples.
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उत्तर
Substances that can flow are called fluids. e.g. gases (oxygen, hydrogen), liquids (water, petrol, sulphuric acid).
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संबंधित प्रश्न
Name the terms for the process due to which a solid directly changes into its vapours.
Classify the following into solid, liquid and gas:
Coal, kerosene, wood, oxygen, sugar, blood, water vapour, milk, wax.
How a liquid changes into its gaseous state ? Explain ?
Define matter.
Give a reason for the Electricity is not considered matter.
Define Molecule.
Match the column.
| Column A | Column B |
| 1. iron and gold | a. molecules are very far apart |
| 2. melting | b. pure substance |
| 3. intermolecular space | c. non-metals |
| 4. compound | d. the space between the molecules |
| 5. gases | e. changes from solid to liquid |
| f. metals |
Multiple choice question.
Which one is a kind of matter:
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
