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Chemistry 9th Class English Medium Online Test MCQs With Answers
Question # 1
The enthalpy of reaction 2H2 +O2-----2H2O
Choose an answer
-571.6 kJ
-110.5 kJ
-393.5 kJ
+53.8 kJ
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Question # 2
How many electons can be accommodated in S subshell?
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2
6
14
10
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Question # 3
To Identify the concentration of a particular solution through titration is and application of.
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astrochemistry
analytical chemistry
geochemistry
Organic chemistry
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Question # 4
In an irrversibel reaction equilibrium
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Never establised
Established quickly
Established slowly
Established when reaction stops
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Question # 5
Actinidws belong to period.
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4th
5th
6th
7th
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Question # 6
A state of matter whose properties are between those of liqids and crystalline solids.
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Plasma
dark matter
Liquid crystal
Supercriticl fluid
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Question # 7
Which types of attractive forces are presentin ionic compounds.
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Covalent bonds
Electrostatic forces of attraction
Mtallic bonds
Coordinate covalent bonds
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Question # 8
When new bonds ae formed, the energy is
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Consume
Remain same
Release
None of these
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Question # 9
The horizontal lines present in the priodic table are called.
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Groups
Periods
Both a and b
None of these
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Question # 10
Empirical formula of hydrogen peroxide.
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HO
CO
CHO
CH
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Question # 11
Why the gas starts coming out when you open a can of fizzy drink.
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Because gteh solubiliyt of the gas increases
Because the gas is dissolved under pressure hence it comes out when pressur eis decreased
Becaue the gas is insoluble in water
Because the solubility of hte gas decreases at high pressure.
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Question # 12
Example of heterogeneious mixture is
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Soil
Gasoline
AIR
Ice Cream
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Question # 13
Which compund has same molecular and emiprical formula.
Choose an answer
C6H12 O6
H2O2
H2O
C6H6
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