List the points of differences between homogeneous and heterogeneous mixtures.
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Homogeneous mixture |
Heterogeneous mixture |
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It is the mixture in which different constituents are mixed uniformly. |
It is the mixture in which different constitutes are not mixed uniformly |
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They cannot have physically distinct parts. |
They have physically distinct parts. |
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The constituents cannot be easily seen. |
The constituents can be easily seen. |
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The constituents cannot be easily separated. |
The constituents can be easily separated. |
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Example: sugar solution, soda water, soft drinks, vinegar, air etc. |
Example: sugar and sand mixture, milk, ink, paint, etc. |
Convert the following temperatures to Kelvin scale.
35°C
To change a temperature on the celsius scale to kelvin scale. Add 273 to given temperature.
35°C = 35 + 273 = 308K
Which one of the following are a matter ?
Chair, air love smell, hate, almonds, thought, cold, cold drinks, smell of perfume
Matter: Chair, air, almonds, cold, drinks.
Give reason for the following observation:
The smell of hot sizzling food reaches you several meters away, but to get the smell from cold food you can have to go close.
The rate of diffusion is very high in case of gases. The particle of hot sizzling food mixes with the particles of air and reaches us several meters away. In case of cold food the food particles do not mix with the particles of air easily. The temperature increases the rate of diffusion. Hence we have to go close to it get the smell.
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