Is Matter Around Us Pure Test

Question 1
1 / -0

Which of the following statements are true for pure substances?

(i) Pure substances contain only one kind of particles

(ii) Pure substances may be compounds or mixtures

(iii) Pure substances have the same composition throughout

(iv) Pure substances can be exemplified by all elements other than nickel

A
(i) and (ii)

B
(i) and (iii)

C
(iii) and (iv)

D
(ii) and (iii)

Question 2
1 / -0

Rusting of an article made up of iron is called

A
Corrosion and it is a physical as well as chemical change

B
Dissolution and it is a physical change

C
Corrosion and it is a chemical change

D
Dissolution and it is a chemical change

Question 3
1 / -0

A mixture of sulphur and carbon disulphide is

A
Heterogeneous and shows Tyndall effect

B
Homogeneous and shows Tyndall effect

C
Heterogeneous and does not show Tyndall effect

D
Homogeneous and does not show Tyndall effect

Question 4
1 / -0

Tincture of iodine has antiseptic properties. This solution is made by dissolving

A
Iodine in potassium iodide

B
Iodine in vaseline

C
Iodine in water

D
Iodine in alcohol

Question 5
1 / -0

Which of the following are homogeneous in nature?

(i) ice

(ii) wood

(iii) soil

(iv) air

A
(i) and (iii)

B
(ii) and (iv)

C
(i) and (iv)

D
(iii) and (iv)

Question 6
1 / -0

Which of the following are physical changes?

(i) Melting of iron metal

(ii) Rusting of iron

(iii) Bending of an iron rod

(iv) Drawing a wire of iron metal

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

B
(i), (ii) and (iv)

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

D
(ii), (iii) and (iv)

Question 7
1 / -0

Which of the following are chemical changes?

(i) Decaying of wood

(ii) Burning of wood

(iii) Sawing of wood

(iv) Hammering of a nail into a piece of wood

A
(i) and (ii)

B
(ii) and (iii)

C
(iii) and (iv)

D
(i) and (iv)

Question 8
1 / -0

Two substances, A and B were made to react to form a third substance, \(A_2B\) according to the following reaction

\(2A + B \rightarrow A_2 B \)

Which of the following statements concerning this reaction are incorrect?

(i) The product \(A_2B\) shows the properties of substances A and B

(ii) The product will always have a fixed composition

(iii) The product so formed cannot be classified as a compound

(iv) The product so formed is an element

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

B
(ii), (iii) and (iv)

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

D
(ii), (iii) and (iv)

Question 9
1 / -0

Two chemical species X and Y combine together to form a product P which contains both X and Y

X + Y → P

X and Y cannot be broken down into simpler substances by simple chemical reactions.

Which of the following concerning the species X, Y and P are correct?

(i) P is a compound

(ii) X and Y are compounds

(iii) X and Y are elements

(iv) P has a fixed composition

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

B
(i), (ii) and (iv)

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

D
(i), (iii) and (iv)

Question 10
1 / -0

A mixture of two or more miscible liquids, for which the difference in the boiling points is less than 25 K can be separated by the process called _______.

A
Centrifugation

B
Heterogeneous

C
Fractional distillation

D
Evaporation

Submit Test

Is Matter Aroun...

Question 1

(i) and (ii)

(i) and (iii)

(iii) and (iv)

(ii) and (iii)

Question 2

Corrosion and it is a physical as well as chemical change

Dissolution and it is a physical change

Corrosion and it is a chemical change

Dissolution and it is a chemical change

Question 3

Heterogeneous and shows Tyndall effect

Homogeneous and shows Tyndall effect

Heterogeneous and does not show Tyndall effect

Homogeneous and does not show Tyndall effect

Question 4

Iodine in potassium iodide

Iodine in vaseline

Iodine in water

Iodine in alcohol

Question 5

(i) and (iii)

(ii) and (iv)

(i) and (iv)

(iii) and (iv)

Question 6

(i), (ii) and (iii)

(i), (ii) and (iv)

(i), (iii) and (iv)

(ii), (iii) and (iv)

Question 7

(i) and (ii)

(ii) and (iii)

(iii) and (iv)

(i) and (iv)

Question 8

(i), (ii) and (iii)

(ii), (iii) and (iv)

(i), (iii) and (iv)

(ii), (iii) and (iv)

Question 9

(i), (ii) and (iii)

(i), (ii) and (iv)

(ii), (iii) and (iv)

(i), (iii) and (iv)

Question 10

Centrifugation

Heterogeneous

Fractional distillation

Evaporation

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