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प्रश्न
What is meant by a substance?
उत्तर
- A substance is one that is composed of only one type of atom or molecule.
- A substance might be an element or a compound; for example, water has only one type of particle, so it is a material.
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संबंधित प्रश्न
‘‘The properties of the product are different from those of the constituents''. State whether this statement best describes an element, a compound or a mixture.
List five characteristics by which compounds can be distinguished form mixtures.
The chemical which can be used to separate a mixture of carbon powder and sulphur powder successfully is :
Give reason:
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Give reason:
Why sulphur does dissolve when carbon disulphide is added to a mixture of iron and sulphur but not when it is added to iron sulphide?
Name the components present in the following mixture:
Tap water
Write “true” or “false” for the following statement
Winnowing is a process to remove small stones from grains.
Tick (√) the correct alternative from the choice given for the following statement:
A gas dissolved in a liquid can be separated by
Suggest separation technique(s) one would need to employ to separate the following mixture.
Common salt, water and sand
A mixture of iron filings and salt is a ______ type of mixture.
