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Online Tests
Chemistry Fsc Part 1 Online Test MCQs With Answers
Question # 1
When small amount of acid or base is added to buffer, its pH.
Choose an answer
Remain same
Always increases
Always decreases
slightly increases or decreases
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Question # 2
Isotopes differ in.
Choose an answer
Properties which depend upon mass
Arrangement of electrons in orbitals
Chemical properties
None of these
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Question # 3
The net heat change in a chemical reaction is same whether it is brought about in two or more different ways in one or several steps. It is knnown as
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Henry's law
Hess's law
Joule's principle
Law of combustion
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Question # 4
Which of the following is psuedo solid
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CaF2
Glass
NaCl
All
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Question # 5
Gas molecules show more deviation from ideal behaviour at high pressure because.
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Velocity of molecules increases
Velocity of molecules decreases
Force of attraction between molecules increases
Force of collision per unit area increases
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Question # 6
The number of bonds in nitrogen molecule is
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One o and one
π
One o and two
π
Three sigma only
Two o and two
π
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Question # 7
Which one of the following molecules is paramagnetic.
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H2
He
N2
O2
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Question # 8
Which pair of molecule have Debye forces in them
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Ar and Ar
Argon and water
Na+ ions and water
water and water
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Question # 9
Those elements whose electronegativities are 1.2 and 3.2, react to form
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Ionic bond
Covalent bond
Gaseous substance
Definiting a liquid substance
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Question # 10
Density of a gas is usually expressed in
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kg m-3
kg dm-3
g dm-3
g cm-3
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Question # 11
Standard enthalpy change when one mole of compound is formed from their elements at standard state is.
Choose an answer
Heat of formation
Standard heat of formation
Heat of combustion
Standard Heat of neutralization
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Question # 12
The born Haber cycle is the best application of law.
Choose an answer
Boyle's
Dalton's
Hess's
Graham's
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Question # 13
If the number of gas molecules are doubled in a certain volume of a gas, the pressure is.
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Decreased to half
Doubled
Increased to four time
Remains unchanged
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Question # 14
If the electron in a hydrogen atom drops from n = 6 to n =4 level, the radiation emitted is in which series of lines in the spectrum of atomic hydrogen.
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Lyman
Balmer
Paschen
Brackett
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Question # 15
How many moles of AgCI are produced by combination of 1.0 mole of AgNO
3
and 2.0 mole of NaCI
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1.0
2.0
3.0
4.0
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Question # 16
That cell in which electrical energy is converted into chemical energy is called
Choose an answer
Galvanic cell
Electrolytic cell
Fuel cell
Daniel cell
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Question # 17
Vapour pressure of liquid depends upon
Choose an answer
Amount of liquid
Surface area
Temperature
Size of container
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Question # 18
The rate of reaction
Choose an answer
Increases as the reaction proceeds
Decreases as the reaction proceeds
Remains the same as the reaction proceeds
May decrease or increase as the reaction proceeds
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