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प्रश्न
Give two examples of the following.
Inert gases
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उत्तर
Helium, Neon
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संबंधित प्रश्न
Give two examples for the following: Metals
Indicate whether the following statement is true or false:
Metals can be polished.
The important physical properties of substances are colour, odour, nature, density & solubility in water.
Name - a poisonous gas almost as heavy as air.
Explain the difference between Atoms and molecules.
Select the correct answer from the choice in the bracket.
The least reactive metal.
Define the terms elements, compounds & mixtures with a view to show their basic difference.
Differentiate between homogenous & heterogeneous mixtures.
The diagram represents fractional distillation for the separation of mixtures. Answer the following :
- Can two immiscible liquids be separated by this process?
- Separation of liquids by this process is based on which physical property?
- If methyl alcohol & water are to be separated, which liquid would remain in flask ‘X’ after condensation.
- Give a reason for the above answer.
- State the purpose of the fractionating column in the apparatus.
Elements : Combine to form compounds :: Compounds : ______.
Differentiate between elements and compounds.
