Separation of Substances Test

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Separation of Substances Test - 4

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Question 1
1 / -0

In a saturated solution :

A
Dissolved solute $$>>>$$ undissolved solute

B
Dissolved solute $$<<<$$ undissolved solute

C
Dissolved solute and undissolved solutes are in equilibrium with each other

D
None of the above

Solution

In a saturated solution dissolved solute and undissolved solute are in equilibrium with each other. At any particular temperature, a solution that has dissolved as much solute as it is capable of dissolving, is said to be a saturated solution.
Question 2
1 / -0

A solution of sugar in which some more sugar could be dissolved without changing its temperature is called a/an :

A
unsaturated solution

B
saturated solution

C
solid solution

D
None of the above

Solution

If the amount of solute contained in a solution is less than the saturation level, it is called an unsaturated solution. It can dissolve more solute in it.
So, a sugar solution that can hold more solute in it without changing the temperature is an unsaturated solution.
Question 3
1 / -0

Wheat flour can be separated from wheat bran by:

A
evaporation

B
sieving

C
churning

D
None of these
Solution
Evaporation is used to separate a solid dissolved in a liquid. Both wheat flour and wheat bran are solid.
Sieving is a physical method used for the separation of particles based on their sizes. Wheat flour is separated from bran by using the sieving method because wheat flour particles are finer than wheat bran. Therefore, sieving is used to separate wheat flour and wheat bran.
Churning is used to separate butter from milk.
So, the correct answer is sieving.
Question 4
1 / -0

At a particular temperature, a solution that has dissolved as much solute as it is capable of dissolving is said to be a:

A
saturated solution

B
unsaturated solution

C
both A and B

D
none of the above

Solution

The solution in which no more amount of solute can be dissolved at a particular temperature is called a saturated solution. On the other hand, an unsaturated solution is one in which more solute can be dissolved at a particular temperature.
Question 5
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Which is the correct order to separate salt from a mixture of salt and sand?

A
Dissolving, Filtration, Evaporation

B
Filtration, Dissolving, Evaporation

C
Filtration, Evaporation, Dissolving

D
Evaporation, Dissolving, Filtration

Solution

First, dissolve the mixture in water and filter out the sand. Then evaporate the water from the saltwater solution and collect the residual salt.

Hence, option A is correct.
Question 6
1 / -0

Winnowing is used to separate:

A
heavier and lighter particles of mixture.

B
different sized particles in the mixture.

C
a mixture of insoluble solid and liquid.

D
None of these

Solution

Winnowing is used to separate heavier and lighter components of a mixture by wind or by blowing air.
A mixture having different-sized particles is separated by filtration and sieving.
A mixture of insoluble solids and liquid is separated by filtration.
Therefore correct option is $$A$$.
Question 7
1 / -0

A solution which contains maximum possible amount of solute at any given temperature is called a:

A
saturated solution

B
supersaturated solution

C
dilute solution

D
unsaturated solution

Solution

Solution which contains maximum possible amount of solute at any given temperature is called a saturated solution. At any particular temperature, a solution that has dissolved as much solute as it is capable of dissolving is said to be a saturated solution.
Question 8
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Which of the following represents correct statement(s)?

A
Winnowing is the process that is used to separate grain from stalks.

B
In winnowing, the stalks are beaten to free the grain seeds.

C
Winnowing is the process used to separate heavier and lighter components of a mixture by wind or by blowing air.

D
All of the above.

Solution

Option (C) represents correct statements.
Threshing is the process that is used to separate the grain from stalks. In threshing, the stalks are beaten to free the grain seeds.
Winnowing is the process used to separate heavier and lighter components of a mixture by wind or by blowing air.
Question 9
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Identify the methods which are used for separation.

A
Handpicking

B
Threshing

C
Winnowing

D
All of the above

Solution

Handpicking, winnowing, sieving, sedimentation, decantation and filtration are some of the methods of separating substances from their mixtures.
Question 10
1 / -0

The mixtures having more than ______ components can be separated by more than one method.

A
two

B
three

C
four

D
five

Solution

Mixtures having more than two components can be separated by using more than one method of separation. For example, a mixture of salt and sand can be separated by sedimentation, then filtration and then evaporation.

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Separation of Substances Test - 4

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Separation of Substances Test - 4

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Question 1

Dissolved solute $$>>>$$ undissolved solute

Dissolved solute $$<<<$$ undissolved solute

Dissolved solute and undissolved solutes are in equilibrium with each other

None of the above

Solution

Question 2

unsaturated solution

saturated solution

solid solution

None of the above

Solution

Question 3

evaporation

sieving

churning

None of these

Solution

Question 4

saturated solution

unsaturated solution

both A and B

none of the above

Solution

Question 5

Dissolving, Filtration, Evaporation

Filtration, Dissolving, Evaporation

Filtration, Evaporation, Dissolving

Evaporation, Dissolving, Filtration

Solution

Question 6

heavier and lighter particles of mixture.

different sized particles in the mixture.

a mixture of insoluble solid and liquid.

None of these

Solution

Question 7

saturated solution

supersaturated solution

dilute solution

unsaturated solution

Solution

Question 8

Winnowing is the process that is used to separate grain from stalks.

In winnowing, the stalks are beaten to free the grain seeds.

Winnowing is the process used to separate heavier and lighter components of a mixture by wind or by blowing air.

All of the above.

Solution

Question 9

Handpicking

Threshing

Winnowing

All of the above

Solution

Question 10

two

three

four

five

Solution

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