Sorting And Separation of Materials Test

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Sorting And Separation of Materials Test - 1

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Weekly Quiz Competition

Question 1
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Consider three groups (i, ii and iii) of various substances given below:

(i) Water, benzene, milk
(ii) Wood, steel, mirror
(iii) Pepper, turmeric, coriander

Which of the following options gives the correct match of the group and the property which is common to all the substances in that group?

A
(i) - Liquid state, (ii) - Opacity, (iii) - Spices

B
(i) - Transparency, (ii) - Smoothness, (iii) - Grains

C
(i) - Liquid state, (ii) - Hardness, (iii) - Pulses

D
(i) - Fluids, (ii) - Brittleness, (iii) - Spices

Solution

The substances in group (i) are all liquids.
All the materials in group (ii) are opaque.
Group (iii) represents a group of spices.
Question 2
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Which of the following materials are lustrous?

(i) Steel knife
(ii) Gold jewellery
(iii) Iodine
(iv) Stone
(v) Silk cloth

A
(i), (ii), (iii) and (v)

B
(i) and (ii)

C
(i), (ii), (iii) and (iv)

D
(i) and (v)

Solution

Steel knife, gold jewellery, iodine and silk cloth all have their characteristic lustre.

Stones, however have a dull surface.
Question 3
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Among the following groups of objects, select the one in which all the objects can be made from plastic, wood, metal as well as glass.

A
Pots for plants, spoons, storage containers

B
Decorative pieces, tables, storage containers

C
Suitcases, scissors, crockery

D
Poles, jewellery, cutlery

Solution

Decorative pieces, tables and storage containers can be made from all the mentioned materials, i.e. plastic, wood, metal and glass.
Question 4
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Which of the following are pure substances?

(i) Elements
(ii) Compounds
(iii) Mixtures

A
(i) only

B
(ii) only

C
Both (ii) and (iii)

D
Both (i) and (ii)

Solution

Both elements and compounds are pure substances because all the constituent particles in the bulk are of the same kind.
Question 5
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Which of the following is not a mixture?

A
Acetic acid

B
Milk

C
Petrol

D
Amalgam

Solution

Pure acetic acid is a compound, whereas milk, petrol and amalgam are mixtures.
Question 6
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Identify the odd one among the following.

A
Plain window pane

B
Etched glass

C
Cellophane paper

D
Glass painting

Solution

A plain window pane is a transparent material, whereas all the other options are translucent.
Question 7
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Which of the following statements is not correct about a compound?

A
A compound shows the properties of its constituent particles.

B
A compound cannot be separated into its constituents by simple physical processes.

C
The chemical composition of a compound is fixed.

D
A compound has fixed melting and boiling points.

Solution

The statement in option (1) is incorrect as a compound has unique properties, which are different from the properties of its constituent elements.
Question 8
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Which of the following is the term used for a homogeneous mixture of metals?

A
Alloy

B
Compound

C
Emulsion

D
Water

Solution

Alloys are homogeneous mixtures of two or more metals and may also include a non-metal.
They (alloys) display the properties of the constituent metals, which is a characteristic of mixtures.

All the compounds, including water, are pure substances.
Emulsions are heterogeneous mixtures of immiscible liquids.
Question 9
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Consider the following substances:

(a) Air
(b) Water
(c) Hydrogen
(d) Milk

Which of the given substances exhibit properties such as variable composition and no sharp melting and boiling points?

A
Both (a) and (b)

B
Both (b) and (c)

C
Both (c) and (d)

D
Both (a) and (d)

Solution

Variable composition and no sharp melting and boiling points are the characteristics of mixtures.
Here, air and milk are mixtures, whereas water is a compound and hydrogen is an element.

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Sorting And Separation of Materials Test - 1

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Sorting And Separation of Materials Test - 1

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Question 1

(i) - Liquid state, (ii) - Opacity, (iii) - Spices

(i) - Transparency, (ii) - Smoothness, (iii) - Grains

(i) - Liquid state, (ii) - Hardness, (iii) - Pulses

(i) - Fluids, (ii) - Brittleness, (iii) - Spices

Solution

Question 2

(i), (ii), (iii) and (v)

(i) and (ii)

(i), (ii), (iii) and (iv)

(i) and (v)

Solution

Question 3

Pots for plants, spoons, storage containers

Decorative pieces, tables, storage containers

Suitcases, scissors, crockery

Poles, jewellery, cutlery

Solution

Question 4

(i) only

(ii) only

Both (ii) and (iii)

Both (i) and (ii)

Solution

Question 5

Acetic acid

Milk

Petrol

Amalgam

Solution

Question 6

Plain window pane

Etched glass

Cellophane paper

Glass painting

Solution

Question 7

A compound shows the properties of its constituent particles.

A compound cannot be separated into its constituents by simple physical processes.

The chemical composition of a compound is fixed.

A compound has fixed melting and boiling points.

Solution

Question 8

Alloy

Compound

Emulsion

Water

Solution

Question 9

Both (a) and (b)

Both (b) and (c)

Both (c) and (d)

Both (a) and (d)

Solution

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