Separation of Substances Test

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Separation of Substances Test - 9

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Question 1
1 / -0

Water can be separated from salt through:

A
distillation

B
evaporation

C
filtration

D
sublimation

Solution

We can separate salt from water by the method of evaporation. On heating the mixture, water evaporates and salt will be left behind.
Question 2
1 / -0

Which of the following processes can be useful in separating the salt from a mixture of sand and salt?

A
Sublimation

B
Filtration

C
Evaporation

D
All of the above

Solution

Filtration is a process by which insoluble solids can be removed from a liquid by using a filter paper. A filter paper is a special type of paper which has pores that are tiny enough to let only liquids pass through it. If you pass a solution through filter paper, any undissolved solid particles will get left behind on the paper whereas the liquid will filter through. The liquid that passes through is called the filtrate and the undissolved solid particles are called residue.

The components of the mixture are salt and sand. Salt is soluble in water and sand is a non-water soluble substance that can be separated by the process of filtration. The insoluble sand remains in the filter paper while the filtrate contains the dissolved salt.
Question 3
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Which of the following methods is most suitable for obtaining a pure, dry sample of sodium chloride from a mixture of solid sodium chloride and sand?

A
Shake the mixture with water, filter and dry the residue on the filter paper.

B
Shake the mixture with water, filter and evaporate the filtrate.

C
Heat the mixture gently and collect the substance which sublimes

D
Heat the mixture gently and collect the substance which boils off

Solution

To obtain a dry sample of sodium chloride ($$NaCl$$) from sand, first, we have to dissolve it in water; then, $$NaCl$$ gets dissolved into water and by filtration, we can separate sand particles and after complete evaporation of water we left with a dry sample of $$NaCl$$.

Hence, option $$B$$ is correct.

Question 4

1 / -0

Arrange the following steps for separating sand and salt in the correct order:

A	Heat filtrate to evaporate the solvent (water).
B	Pour salt water filtrate into an evaporating basin on a tripod over a bunsen burner.
C	Filter to remove the insoluble sand.
D	Place the sand/salt mixture into a beaker and add water.
E	Allow basin to cool & collect salt.
F	Stir to allow the salt to dissolve in the water.

$$CDFBAE$$

$$CDBAFE$$

$$DFCBAE$$

$$ABCDEF$$

Solution

We can separate a mixture of salt and sand by first mixing it in water and allowing salt to dissolve in the water. We can then filter out the sand as it does not dissolve in water. Then, if we heat the salt water filtrate, the water evaporates, leaving behind salt.

Question 5
1 / -0

During the process of filtration, the solid particles remain on filter paper, these solid particles are called_____.

A
solution

B
sediment

C
filtrate

D
residue

Solution

In this process, the insoluble solid particles are separated from the liquid by using filter paper. In this process, the mixture is passed through the filter paper. The liquid gets easily passed through the pores of a filter leaving behind only solid particles. The water is called filtrate and the solid is called 'residue'.
Question 6
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A solvent (water) contain both soluble and insoluble impurities. How will you separate them?

A
By filtration followed by evaporation

B
By sedimentation followed by precipitation

C
By crystallisation

D
By fractional distillation

Solution

The solvent can be separated from insoluble impurities by using filtration. The solution thus obtained will contain solvent along with soluble impurities. This mixture can be separated by using evaporation.

Hence, option A is correct.
Question 7
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The different processes used to separate sand, sawdust, and salt from the mixture dissolved in water are respectively:

A
sedimentation, filtration and evaporation

B
filtration, evaporation and condensation

C
decantation and evaporation

D
hand picking and evaporation
Solution
Sedimentation is used to remove sand from water as sand particles settle down easily.
Filtration is used to remove sawdust from water as the sawdust can be captured by the filter paper.
Evaporation can be used to separate salt from water as the water evaporates and salt is left behind.
Question 8
1 / -0

In which of the following mixtures hand picking method can be best used?

A
The mixture of gas and liquid.

B
The mixture of liquid and liquid.

C
The mixture of solid and liquid.

D
The mixture of solid and solid.

Solution

Hand-picking is a method of separation used where one of the component is in small quantity. And it is best for mixture of solids, for eg- Stone in rice.
Question 9
1 / -0

The essential condition for winnowing activity is:

A
water

B
wind

C
electricity

D
machines

Solution

Winnowing is a method of separation of chaff or husk from wheat/grains. Also called the process of separation of heavier components from lighter components by the application of $$wind$$.
option $$B$$ is correct.
Question 10
1 / -0

Which method is used to separate lighter particles like fodder from grains?

A
Hand picking

B
Sieving

C
Winnowing

D
Sedimentation

Solution

Winnowing can be used to remove lighter particles of fodder from grains. In winnowing the lighter particles of one substance get separated from comparatively heavier particles of another substance with the help of wind.
Winnowing is done in the direction of air so that the lighter particles get blown away by the air leaving behind only heavier particles.

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Separation of Substances Test - 9

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Separation of Substances Test - 9

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SHARING IS CARING

Question 1

distillation

evaporation

filtration

sublimation

Solution

Question 2

Sublimation

Filtration

Evaporation

All of the above

Solution

Question 3

Shake the mixture with water, filter and dry the residue on the filter paper.

Shake the mixture with water, filter and evaporate the filtrate.

Heat the mixture gently and collect the substance which sublimes

Heat the mixture gently and collect the substance which boils off

Solution

Question 4

$$CDFBAE$$

$$CDBAFE$$

$$DFCBAE$$

$$ABCDEF$$

Solution

Question 5

solution

sediment

filtrate

residue

Solution

Question 6

By filtration followed by evaporation

By sedimentation followed by precipitation

By crystallisation

By fractional distillation

Solution

Question 7

sedimentation, filtration and evaporation

filtration, evaporation and condensation

decantation and evaporation

hand picking and evaporation

Solution

Question 8

The mixture of gas and liquid.

The mixture of liquid and liquid.

The mixture of solid and liquid.

The mixture of solid and solid.

Solution

Question 9

water

wind

electricity

machines

Solution

Question 10

Hand picking

Sieving

Winnowing

Sedimentation

Solution

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