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Question 1 Chemistry 2015 | JAMB/UTME (2015)
A
burning 
B
adsorption 
C
evaporation 
D
absorption 
Explanation.
Share Answer

The acetate and paper modify the particulate smoke phase by particle retention (filtration), and finely divided carbon modifies the gaseous phase (adsorption)


Correct Option:
B
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Question 2 Chemistry 2015 | JAMB/UTME (2015)
A
Drug making 
B
Cement making 
C
Paint making 
D
Perfume making 
Explanation.
Share Answer Crystallization is required the most in industries where the purity of their products is important e.g in the manufacture of drugs and in sugar production. Options B,C and D do not undergo crystallization

Correct Option:
A
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Question 3 Chemistry 2015 | JAMB/UTME (2015)
A
Make it more malleable 
B
Remove the impurities unit 
C
Protect it against corrosion 
D
Render it passive 
Explanation.
Share Answer Iron is galvanized with zinc covering to protect it against corrosion. Option A, B, D are the main reasons iron is galvanized

Correct Option:
C
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Question 4 Chemistry 2015 | JAMB/UTME (2015)
A
washing under pressure 
B
drying over phosphorus (V) oxide 
C
passing the mixture to the limewater 
D
using ammonical copper (I) chlorine 
Explanation.
Share Answer Washing under pressure is an action in the industrial production of H. Options B,C,D will not yield Co and H

Correct Option:
A
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Question 5 Chemistry 2015 | JAMB/UTME (2015)
A
chlorine 
B
ozone 
C
carbon IV oxide 
D
hydrogen sulphur 
Explanation.
Share Answer The ozone layer or ozone shield refers to a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet (UV) radiation. It contains high concentrations of ozone (O3) relative to other parts of the atmosphere, although still very small relative to other gases in the stratosphere

Correct Option:
B
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Question 6 Chemistry 2015 | JAMB/UTME (2015)
A
monometer 
B
the single bond 
C
the double bond 
D
a polymer 
Explanation.
Share Answer Vulcanizer is the removal of double bend in a chemical reaction. Option A,B,D can not be removed by vulcanizer

Correct Option:
C
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Question 7 Chemistry 2015 | JAMB/UTME (2015)
A
HNO3 
B
CH3COOH 
C
H2SO 
D
HCl 
Explanation.
Share Answer HeSO4 is the acid used in the electrolysis of water. Option A,B,D are concentrated acid and they will react with the water

Correct Option:
C
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Question 8 Chemistry 2015 | JAMB/UTME (2015)
A
distillation 
B
sublimation 
C
precipitation 
D
evaporation 
Explanation.
Share Answer Sublimation is the transformation of solid gaseous state without passing through the liquid state. Options A,C,D do not show case these character of sublimation as they do not bye pass states. They are in a particular order

Correct Option:
B
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Question 9 Chemistry 2015 | JAMB/UTME (2015)
A
efflorescence 
B
dliquescence 
C
effervescence 
D
fluorescence 
Explanation.
Share Answer Efflorescence is a process of long exposure to the atmosphere which favors salt loss of water. Options B, C, D are not related to loss of water

Correct Option:
A
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