Chapter 02 Is Matter Around Us Pure? Questions-01
Questions
1. What is meant by a pure substance?
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Answer
Substance having single type of particles is known as pure substance.
For example:Hydrogen, Water etc., are pure.
Note:All elements and compounds are considered to be pure.
2. List the points of differences between homogeneous and heterogeneous mixtures.
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Answer
| Homogeneous mixture | Heterogeneous mixture |
|---|---|
| Its constituent’s particles cannot be seen easily. | Its constituent particles can be seen easily. |
| There are no visible boundaries of separation in a homogeneous mixture. | Have visible boundaries of separation between the constituents. |
| Its constituents cannot be easily separated. | Its constituents can be separated by simple methods. |
| Examples: Alloys, solution of salt in water etc. | Examples: Mixture of sand and common salt, mixture of sand and water etc. |
