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प्रश्न
Is air a mixture or a compound ? Give three reasons for your answer.
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उत्तर
Air is a mixture because:
- it consists of different gases (and some dust),
- its composition is not fixed, and
- it can be split into its components.
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संबंधित प्रश्न
State three reasons why you think air is a mixture and water is a compound.
Write “true” or “false” for the following statement
A pure substance consists of only one kind of atom or molecule.
Give a reason why sublimable and non-sublimable substances can be separated easily, but two sublimable substance cannot.
State whether the following statement is true or false. If false write – the correct statement.
Mixture has no definite set of properties.
Give an example for mixture and justify your answer with reason.
Why do we need to separate different components of a mixture? Give two examples.
Which of the following are physical changes?
(i) Melting of iron metal
(ii) Rusting of iron
(iii) Bending of an iron rod
(iv) Drawing a wire of iron metal
While diluting a solution of salt in water, a student by mistake added acetone (boiling point 56°C). What technique can be employed to get back the acetone? Justify your choice.
What would you observe when
an aqueous sugar solution is heated to dryness.
A mixture does not have a fixed ______.
