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Online Tests
Chemistry Fsc Part 1 Chapter 3 Online Test MCQs With Answers
Question # 1
If temperature of one mole of ideal gas at 273 K and one atmospheric pressure is increased by 1 K, amount of energy absorbed is.
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0.082 dm3 atm
1.987 cal.
8.313 J
All are correct.
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Question # 2
Weak intermolecular forces are present in.
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Only gases
Only liquid
Only solids
gases, liquids and solids
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Question # 3
Borax has the chemical formula.
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KNO3
Na2B3O7.10H2O
Na2CO3
NaNO3
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Question # 4
The concept of distribution of velocities among the gas molecules was given by.
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Clausius
Mexwell
Boltzmann
Vander waal
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Question # 5
At which distance a molecule is present from its neighbor molecules of its own diameter, at room temperature.
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100 times
200 times
300 times
400 times
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Question # 6
The rate of diffusion of a gas is
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Directly proportional to its density
Directly proportional to molecular mass
Inversely proportional to its density
Inversely proportional to square root of its molecular mass
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Question # 7
Observed pressure is less than ideal pressure for any gas due to
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Intermolecular forces
Size of molecules
Boiling point of molecules
Both a and c
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Question # 8
More ideal gas at room temperature is.
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CO2
NH3
SO2
N2
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Question # 9
Keeping the temperature constant of the gas is expanded.
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Pressure will decrease
Temperature will increase
Kinetic energy of molecules will increase
No. of gas molecules increases
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Question # 10
A gas is heated in such a way that its volume and absolute temperature both are doubled. the pressure of the gas
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Becomes 2 times
Becomes 4 times
Become half
Remain same
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Question # 11
A real gas obeying Van der Waal's equation will resemble ideal gas if.
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Both a and b are large
Both a and b are small or zero
A is small and b is large
A is large and b is small
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Question # 12
At constant temperature in a given mass of and ideal gas.
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The ratio of pressure and volume remains constant
Volume always remains constant
Pressure always remains constant
The product of pressure and volume remains constant
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Question # 13
The Van der Waals' equation explain the behaviour of.
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Ideal gas
Real gas
Vapours
Non ideal gases
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Question # 14
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 # 15
Normal temperature and pressure (S.T.P) of gas rafers to
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273 K and 76 mm Hg
273° C and 760 mm Hg
273 K and 760 mm Hg
273° C and 76 mm Hg
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Question # 16
Under which conditions of temperature and pressure will a real gas behave most like an ideal gas.
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Low temperature and how pressure
High temperature and high pressure
Low temperature and high pressure
High temperature and low pressure
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Question # 17
Which mixture of gases is used by the deep sea divers.
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Oxygen and nitrogen
Oxygen and helium
Oxygen and carbon di oxide
Oxygen and water vapours
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Question # 18
The spreading of fragrance of a rose or scent in air is due to.
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Effusion
Diffusion
Osmosis
Evaporation
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