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प्रश्न
What are compounds? Give two examples.
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उत्तर
A compound is a pure substance that is formed when the atoms of two or more elements combine chemically in definite proportions.
Example : H2O, NaCl,
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संबंधित प्रश्न
Fill in the blank
In a _______ the substances are not combined chemically.
Write true or false
Handpicking can be used as a separation technique if the particle size of the constituents of the mixture is the same.
What is the difference between a pure substance and a mixture ?
State four differences between compounds and mixtures.
What is the molecular formula of the following compound?
Sulphuric acid
Explain the characteristics of compounds
Match the following.
| Iron | For making wires |
| Copper | Sewing needle |
| Tungsten | As a fuel for ignition in rocket |
| Boron | Making the filament of a bulb |
Mention the uses of the following compounds.
- Baking soda
- Bleaching powder
- Quick lime
Higher-Order Thinking questions:
Why is water considered a compound?
The other name for potassium hydroxide is caustic potash.
