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Online Tests
Chemistry 10th Class English Medium Online Test MCQs With Answers
Question # 1
When the rate of a the forward reaction takes place at the rate of reverse reaction the composition of the reaction mixture remains constant it is called.
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Chemical equilibrium
Dynamic equilibrium
Static equilibrium
All
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Question # 2
The two major components of atmosphere are:
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Hydrogen and oxygen
Nitrogen and Hydrogen
Nitrogen and oxygen
Oxygen and water.
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Question # 3
Marsh gas is mostly :
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ethane
methane
butane
propane
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Question # 4
These are safe source of food and energy for body during emergency.
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Proteins
Vitamins
Carbohydrats
Lipids
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Question # 5
By which process alkenes are prepared from alcohols:
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Dehelogenation
Dehydrogenation
Dehydration
Dehydro-halogenation
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Question # 6
Petroleum fraction having composition C
7
to C
10
IS called
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Petroleum gas
Petroleum Ether
Kerosine oil
Gasoline or petrol
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Question # 7
Carbonization process is the conversion of
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Coal into coal gas
Coal into wood
Wood into coal
Wood into coal tar
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Question # 8
One of the hydrocarbons reacts with one mole of hydrogen to form a saturated hydrocarbon. What formula could be of the X.
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C
3
H
8
C
6
H
12
C
4
H
10
C
7
H
16
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Question # 9
Active mass is expressed as:
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{ }
[ ]
( )
l l
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Question # 10
When a system is at equilibrium states?
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The concentration of reactants and products becomes equal
The opposing reactions
The rate of the reverse reaction becomes very low
The rates of the forward and reverse reactions becomes equal.
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Question # 11
Equilibrium constant has no unit when number of moles of reactants and products are:
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same
Different
Both a and b
None of these
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Question # 12
A conjugate acid is a specie formed by accepting a.
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Proton
Electron pair
Neutron
Electron
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Question # 13
Citric acid is present in
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Citrus fruits
Sour milk
Rancid butter
Apple
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