Solution, Mixtures And Separation Methods Test

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Solution, Mixtures And Separation Methods Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following will not show Tyndall effect?

A
Vinegar

B
Blood

C
Ink

D
Smoke
Question 2
1 / -0

Which of the following statements is true about the physical changes and chemical changes?

A
During a chemical change the reactants form products of equal mass.

B
The physical changes can not be reversed.

C
The chemical changes can be reversed.

D
In physical changes a new substance is formed and energy is either liberted or absorbed.
Question 3
1 / -0

Which of the following processes is not an example of a physical change in water?

A
Heating of water to its boiling point.

B
Formation of liquid water by cooling of water vapour or by heating of ice.

C
Cooling of water to its freezing point.

D
Adding of an acid to water, which results in the formation of bubbles of gas.
Question 4
1 / -0

Which of the following colloidal systems contains solid in the dispersed phase?

A
Starch

B
Milk

C
Butter

D
Ice cream
Question 5
1 / -0

Which of the following statements about mixtures is not true?

A
The components of a mixture do not react with each other.

B
Each component of a mixture retains its characteristic properties.

C
A mixture can be separated into its constituents by physical means.

D
The components of mixtures combine physically in a definite proportion.

Solution

The composition of a mixture is not fixed.
Question 6
1 / -0

Which of the following statements is true about mixtures?

A
A simple mixture involves the combination of solids only.

B
A simple mixture involves the combination of liquids only.

C
A simple mixture involves the combination of gases only.

D
A simple mixture may involve various combinations of solids, liquids and gases.
Question 7
1 / -0

Which of the following statements is correct about homogeneous and heterogeneous mixtures?

A
Heterogeneous mixtures are mixtures that have a definite composition.

B
Salad is a typical example of a heterogeneous mixture.

C
Homogeneous mixtures are mixtures that have a definite composition.

D
A homogeneous mixture can contain more than one phase.

Solution

Salad is a typical example of a heterogeneous mixture.

The other statements are incorrect as all mixtures (homogeneous or heterogeneous) have a variable composition.
All the components in a homogeneous mixture are in the same phase.
Question 8
1 / -0

We have a mixture of four liquids a, b, c and d with boiling points 50^oC, 70^oC, 80^oC and 100^oC respectively. Which liquid will separate out first during fractional distillation?

A
a

B
b

C
c

D
d
Question 9
1 / -0

During the separation of dissolved solids by chromatography, which of the following properties of solids is used?

A
Melting point

B
Boiling point

C
Solubility

D
Hardness
Question 10
1 / -0

If a maximum of 32 grams of potassium nitrate can be dissolved in 100 grams of water at 20^oC, then the solubility of potassium nitrate in water at 20^oC will be

A
320 grams

B
3.2 grams

C
32 milligrams

D
32 grams

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Solution, Mixtures And Separation Methods Test - 4

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Solution, Mixtures And Separation Methods Test - 4

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SHARING IS CARING

Question 1

Vinegar

Blood

Ink

Smoke

Question 2

During a chemical change the reactants form products of equal mass.

The physical changes can not be reversed.

The chemical changes can be reversed.

In physical changes a new substance is formed and energy is either liberted or absorbed.

Question 3

Heating of water to its boiling point.

Formation of liquid water by cooling of water vapour or by heating of ice.

Cooling of water to its freezing point.

Adding of an acid to water, which results in the formation of bubbles of gas.

Question 4

Starch

Milk

Butter

Ice cream

Question 5

The components of a mixture do not react with each other.

Each component of a mixture retains its characteristic properties.

A mixture can be separated into its constituents by physical means.

The components of mixtures combine physically in a definite proportion.

Solution

Question 6

A simple mixture involves the combination of solids only.

A simple mixture involves the combination of liquids only.

A simple mixture involves the combination of gases only.

A simple mixture may involve various combinations of solids, liquids and gases.

Question 7

Heterogeneous mixtures are mixtures that have a definite composition.

Salad is a typical example of a heterogeneous mixture.

Homogeneous mixtures are mixtures that have a definite composition.

A homogeneous mixture can contain more than one phase.

Solution

Question 8

a

b

c

d

Question 9

Melting point

Boiling point

Solubility

Hardness

Question 10

320 grams

3.2 grams

32 milligrams

32 grams

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