Chemistry (2018) | Study Mode

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Question 1
A
atomic weights
B
isotopic weights
C
molecular weights
D
atomic numbers
Explanation

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Correct option: D
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Question 2
A
2.2 M
B
1.1 M
C
0.22 M
D
0.11 M
Explanation

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Correct option: C
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Question 3
Chemistry (2018) Q 3 image
A

be bleached

B

turn green

C

turn red

D

turn blue

Explanation

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Correct option: D
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Question 4
A
Al and Mg
B
Zn and Fe
C
Zn and Pb
D
Pb and H
Explanation

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Correct option: A
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Question 5
A

collisions are perfectly elastic

B

forces of repulsion exist

C

forces of repulsion and attraction are in equilibrium

D

collisions are inelastic.

Explanation

Collisions between gas particles or collisions with the walls of the container are perfectly elastic. None of the energy of a gas particle is lost when it collides with another particle or with the walls of the container.


Correct option: A
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Question 6
A
I, II, III and IV
B
I and II only
C
II only
D
I, III and IV only.
Explanation

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Correct option: D
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Question 7
A

Elements in the same period have the same number of valence electrons

B

The valence electrons of the elements in the same period increase progressively across the period.

C

Elements in the same group have the same number of electron shells

D

The non-metallic properties of the elements tend to decrease across each period.

Explanation

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Correct option: B
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Question 8
A
hydrolysis
B
esterification
C
acidification
D
saponification
Explanation

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Correct option: D
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Question 9
A
CO2 and H2O
B
NO and H2O
C
CO and CO2
D
SO2 and NO
Explanation

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Correct option: D
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Question 10
A
lowering the pressure of the reaction
B
increasing the surface area of the reaction
C
increasing the rate of the reaction
D
lowering the energy barrier of the reaction.
Explanation

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Correct option: D

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