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Question 1 Chemistry (2018) | JAMB/UTME (2018)
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 Chemistry (2018) | JAMB/UTME (2018)
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 4 Chemistry (2018) | JAMB/UTME (2018)
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 Chemistry (2018) | JAMB/UTME (2018)
A

collisions are perfectly elastic

 
B

forces of repulsion exist

 
C

forces of repulsion and attraction are in equilibrium

 
D

collisions are inelastic.

 
Explanation.
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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 Chemistry (2018) | JAMB/UTME (2018)
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 Chemistry (2018) | JAMB/UTME (2018)
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 9 Chemistry (2018) | JAMB/UTME (2018)
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 Chemistry (2018) | JAMB/UTME (2018)
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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