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Published on: 14/09/2019
Separation of Substances
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1.
Raghav is given a glass bottle with some white substances in it that is either chalk or sugar. How can be find out which of the two is sugar or chalk, without tasting it.
2.
Differentiate between homogeneous and heterogeneous solution.
3.
What is a saturated solution?
4.
Write the steps involved in distillation.
5.
In sharbat, what should be mixed first, ice cubes or sugar?
6.
Write down the components of the following mixtures.
(a) air, (b) soil
7.
Does water dissolve equal amounts of different soluble substances?
8.
What will happen if a high quantity of substances forced to dissolve in the fixed amount of water?
9.
Which method of separating tea leaves from prepared tea is better, decantation or filtration?
10.
How chalk powder can be separate from a mixture of chalk powder and water?
11.
Write one purpose of separating substance from a mixture.
12.
Water is separated from rice and pulses after washing them. How?
13.
Which method is used to separate the pieces of stones from grains?
14.
Winnowing is based on which property?
15.
Give one example of sieving used in everyday life.
1.
This can be done by dissolving both of them in water. Sugar gets dissolved in water while or chalk is insoluble in water.
2.
| Homogeneous solution | Heterogeneous solution |
|---|---|
| A solution in which all its components are evenly distributed throughout is called homogeneous solution | A solution in which its components are not evenly distributed throughout the solution is called heterogeneous solution |
3.
A saturated solution of a substance is the one in which no more of that substance can be dissolved.
4.
Evaporation and condensation are two processes involved in distillation.
5.
We shall mix sugar first and then ice cubes
6.
(a) Components of air are nitrogen, oxygen, argon, carbon dioxide and other gases.
(b) Components of soil are sand, silt and clay
7.
No, water dissolve unequal amounts of different soluble substances.
8.
After a certain amount, substances tend to undissolve in water.
9.
Filtration is better than decantation to separate tea leaves from prepared tea.
10.
A mixture of chalk powder and water is separated by filtration.
11.
To separate harmful or non-useful substances and to obtain the useful component.
12.
By the process of decantation, water is separated from rice and pulses after washing them.
13.
Handpicking is the method which is used to separate the pieces of stones from grains.
14.
Winnowing is based on the property that the grains are heavier than husk and hay.
15.
Separation of bran (choker) from flour.
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