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Chemistry 9th Class English Medium Online Test MCQs With Answers
Question # 1
Example of heterogeneious mixture is
Choose an answer
Soil
Gasoline
AIR
Ice Cream
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Question # 2
Bond dissociation for O2 is
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505 kJ/mol
705 kJ/mol
605 kJ/mol
498 kJ/mol
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Question # 3
M shell has sub sheels.
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1s , 2s
1s,2s,3s
2s,2p
3s,3p,3d
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Question # 4
Whcih branches of chemistry deals with the changes that occur in atomic nuclei.
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Environmental chemistry
nuclear chemistry
Astrochemistry
Bio chemistry
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Question # 5
Actinide series starts after the element
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Actinium
Lanthanum
Osmum
Silver
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Question # 6
Which compund has same molecular and emiprical formula.
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C6H12 O6
H2O2
H2O
C6H6
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Question # 7
The elementss of group 1 and 2 are placed in which block
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s
p
d
f
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Question # 8
CaO or lime is used extensive in steel, glass and paper industries. It is produced inan exothermic reversitble reaction by the decompositon of lie . Choose the conditions to produce maximum amount of lime.
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Heating at high temperatur ein an open vessel
Heating at high temperatur ein a closed vessel
Cooling it in a closed vessel
Colling it in an open vessel
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Question # 9
The man made polymer is
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Polystyrene
Starch
Protein
Cellulose
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Question # 10
How many number of moles are equivalent to 8 gram of CO2.
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0.18
0.15
0.24
0.21
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Question # 11
Which of the following is a heterogeneous mixture
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Concrete mixture
a solution of potassium nitrate in water
a solution of calcium hydroxide in water
Hot chocolate
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Question # 12
How many covalent bonds does C
2
H
2
molecule have.
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Two
Three
Four
Five
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Question # 13
When system is at quilibrium state.
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The rate of the forward and reverse rections become equal
The concentrationof reatants and product becoes equal
The oposing reactions stop
The rate of the reverse reactio becomes very low
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