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प्रश्न
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 |
जोड़ियाँ मिलाइएँ
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उत्तर
| Iron | Sewing needle |
| Copper | For making wires |
| Tungsten | Making the filament of a bulb |
| Boron | As a fuel for ignition in rocket |
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संबंधित प्रश्न
Fill in the blank
In a _______ the substances are not combined chemically.
Write true or false
The constituents of a mixture can only be separated by chemical means.
State the information obtained from the formula of a compound.
Give the example of a compound containing carbon and oxygen.
Explain the term mixture.
Write the chemical formula and name the elements present in the following compounds.
- Sodium chloride
- Potassium hydroxide
- Carbon dioxide
- Calcium oxide
- Sulphur dioxide
Mention any four compounds and their uses.
Sodium chloride is used as table salt and for flavoring and preserving food.
Which of the following are not compounds?
- Chlorine gas
- Potassium chloride
- Iron
- Iron sulphide
- Aluminium
- Iodine
- Carbon
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- Sulphur powder
The other name for potassium hydroxide is caustic potash.
