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10th Class Chemistry English Medium KPK Boards Online Mcqs MCQs With Answers
Question # 1
Concentration of the copper ore is carried out by:
Choose an answer
Calcinations
Roasting
Forth flotation
Distillation
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Question # 2
Which of the following salt is soluble in water.
Choose an answer
NaCl
KCl
Na
2
SO
4
All of them
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Question # 3
Which salt is used for the manufacture of detergents, pulp and paper?
Choose an answer
NaCl
Na
2
CO
3
Na
2
SiO
3
NaCl
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Question # 4
Specific Heat capacity of water is about.
Choose an answer
4.0 Jg
-1
K
-1
4.1 Jg
-1
K
-1
4.2 Jg
-1
K
-1
4.3 Jg
-1
K
-1
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Question # 5
Formula of soda ash is.
Choose an answer
Na
2
CO
3
NaHCO
3
Na
2
SO
4
Na
3
PO
4
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Question # 6
DNA was discovered by
Choose an answer
J .Watson
Funk
Robert brown
Hopkins
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Question # 7
Which one of the following is not an air pollutants?
Choose an answer
Nitrogen
Carbon dioxide
Nitrogen oxide
Ozone
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Question # 8
Ozone is beneficial for us as it
Choose an answer
Absorb infrared radiation.
Absorb Ultraviolet radiations.
Absorb Chlorofluorocarbons
Absorb Air pollulant
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Question # 9
Which one of the following is a synthetic fiber:
Choose an answer
cotton
wool
nylon
silk
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Question # 10
Soda lime is a mixture of..
Choose an answer
CaCl, + KOH
NaOH + CaO
NaOH + CaCl
2
Ca(OH)
2
+ CaO
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Question # 11
Potassium Ferrocyanide is a:
Choose an answer
Normal salt
Mixed salt
Complex salt
Double salt
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Question # 12
If an organic compound has 4 carbon atoms, all singly bonded, it will have the following characteristics except one.
Choose an answer
It will be saturated hydrocarbon
It will hav 8 hydrogen atoms
Its name will be n-butane.
It will be least reactive.
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Question # 13
The general formula of alkane is
Choose an answer
C
n
H
2n+2
C
n
H
2n-2
C
n
H
2n
C
n
H
2n+1
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