Is Matter Around Us Pure Test

Result

Is Matter Around Us Pure Test - 55

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Which of the following is correct about distillation?

A
The action of purifying a solid by heating and cooling

B
The action of purifying a liquid by heating it

C
The action of purifying a liquid by heating and cooling

D
None of the above

Solution

Distillation is the process of separating the components or substances from a liquid mixture. In this process, the liquid mixture is boiled. When the boiling point of a component of the mixture is reached, it gets converted to vapor, and later these vapors are condensed and separated. Thus distillation involves both heating and cooling. Hence option C is correct.
Question 2
1 / -0

Pure water can be separated from salt water through _____.

A
simple distillation

B
sublimation

C
filtration

D
None of the above

Solution

Simple distillation is a method for separating the solvent from the solution. Pure water can be separated from the salt solution by a simple distillation method. This method works because water has a much lower boiling point than salt. When the solution is heated, the water evaporates. It is then cooled and condensed into a separate flask. The salt does not evaporate and it stays behind.
Question 3
1 / -0

Copper sulphate crystals are of which color after purification?

A
White

B
Black

C
Blue

D
Yellow

Solution

To crystallize copper sulfate, it is dissolved in water and a small quantity of dilute sulphuric acid is added to prevent the hydrolysis of copper sulfate. The impurities left behind in the solution are removed by filtration. The filtrate is concentrated to the crystallization point and then cooled. On cooling, transparent blue crystals of copper sulfate separate.
Question 4
1 / -0

After purification by crystallization, copper sulphate crystals can be obtained by :

A
filtration

B
passing through funnel

C
evaporation to dryness

D
All of above

Solution

Impure copper sulphate is dissolved in water and heated till saturation. It is then cooled and crystals of pure copper sulphate are formed. These crystals are then separated by filtration and then dried.
Question 5
1 / -0

Directions For Questions

Take small amounts of salt and add it to large amounts of water. X is formed. The substances is called Z and the salt solution formed is called A . A solution in which more of the solute can be dissolved at a given temperature is called B solution. A solution which cannot dissolve any more of the solute at a given temperature is C solution.

...view full instructions

What is C?

A
Salt solution

B
Unsaturated

C
Saturated

D
Super saturated solution
Question 6
1 / -0

Which of the following can be separated by crystallization?

A
Copper sulphate

B
Salt

C
Potash alum (phitkari)

D
All of the above

Solution

Crystallization is the process that is used to separate a pure solid in the form of its crystals from a solution.
Copper sulphate, salt, and potash alum can be purified by this method. In this process, the solution of the substance is heated and then cooled to form crystals.
Question 7
1 / -0

During crystallization of copper sulphate, heating is stopped when :

A
solution becomes saturated

B
solution reaches boiling point

C
solution is reduced to half of its quantity

D
None of the above

Solution

The crystallization process begins with dissolving the impure copper sulphate sample in a minimum amount of water and then heating it. It is heated to saturation rather than dryness and once it is saturated the heating is stopped and the solution is allowed to cool.
Option $$A$$ is correct.
Question 8
1 / -0

The process of crystallization begins by:

A
cooling in ice

B
evaporation by heating

C
passing to porous material

D
None of the above

Solution

Crystallization is a separation technique that is used to separate a solid that has dissolved in a liquid and made a solution. The solution is warmed in an open container, allowing the solvent to evaporate, leaving a saturated solution.
Question 9
1 / -0

While obtaining pure copper sulfate by crystallization, the solution is saturated that is indicated by:

A
change in color

B
change in consistency

C
formation of bubbles

D
formation of crystals near rod

Solution

During purification of copper sulfate by crystallization, the impure sample is mixed with water and then heated to saturation. The saturation is indicated by dipping the glass rods in solution from time to time. Small crystals are formed near the glass rods which indicates saturation.
Question 10
1 / -0

Alcoholic beverages are made through which of the following?

A
Filtration

B
Distillation

C
Evaporation

D
None of the above

Solution

Alcoholic beverages are made through distillation. liquid ethanol can be separated from a mixture of ethanol and water by fractional distillation.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Is Matter Around Us Pure Test - 55

Result

Is Matter Around Us Pure Test - 55

Score

-

Rank

-

SHARING IS CARING

Question 1

The action of purifying a solid by heating and cooling

The action of purifying a liquid by heating it

The action of purifying a liquid by heating and cooling

None of the above

Solution

Question 2

simple distillation

sublimation

filtration

None of the above

Solution

Question 3

White

Black

Blue

Yellow

Solution

Question 4

filtration

passing through funnel

evaporation to dryness

All of above

Solution

Question 5

Salt solution

Unsaturated

Saturated

Super saturated solution

Question 6

Copper sulphate

Salt

Potash alum (phitkari)

All of the above

Solution

Question 7

solution becomes saturated

solution reaches boiling point

solution is reduced to half of its quantity

None of the above

Solution

Question 8

cooling in ice

evaporation by heating

passing to porous material

None of the above

Solution

Question 9

change in color

change in consistency

formation of bubbles

formation of crystals near rod

Solution

Question 10

Filtration

Distillation

Evaporation

None of the above

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.