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ECAT Chemistry Chapter 9 Solutions Online Test MCQs With Answers
Question # 1
What will be the molarity of solution if 103 g (NH
4
)
2
SO
4
is dissolved per 600 cm
3
of water
Choose an answer
2.32 M
3.32 M
4.32 M
1.30 M
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Question # 2
Hydrolysis of potassium acetate produces
Choose an answer
Acidic solution
Neutral solution
Basic solution
None of these
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Question # 3
An azeotropic mixture of two liquids boils at a lower temperature than either of them when :
Choose an answer
It is saturated.
It shows positive deviation from Raoult's law.
It show negative deviation from Raoult's law.
It is metastable.
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Question # 4
If 5.85 of NaCI are dissolved in 90g of water the mole fraction of NaCI is
Choose an answer
0.1
0.01
0.2
0.0196
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Question # 5
The molarity of solution containing 14.5 grams urea (N
2
H
4
CO) dissolved in 100 cm
3
of the solution is
Choose an answer
1 molar
0.1 molar
0.2 molar
0.25 molar
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Question # 6
Which statement is incorrect for and ideal solution
Choose an answer
The forces of attractions between solute and solvent molecules are same
There is no evolution or absorption of heat
Volume of the solution is less than sum of volumes of individual components
Vapour pressure of solution is directly proportional to the mole fraction of solvent
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Question # 7
Solubility of a substance in water decreases with rise in temperature except
Choose an answer
CaCI
2
. 6H
2
O
Pb(NO
3
)
2
K
2
Cr
2
O
7
Ce
2
(SO
4
)
3
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Question # 8
Which inorganic precipitate acts as semipermeable membrane?
Choose an answer
Calcium sulphate
Barium oxalate
Nickel phosphate
Copper ferrocyanide
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Question # 9
The relative lowering of vapour pressure is equal to the mole fraction of the solute, This law is called
Choose an answer
Henry's law
Raoult's law
Ostwald's law
Arrhenius law
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Question # 10
The process in which solvent particles surround solute particles is called
Choose an answer
Hydrolysis
Hydration
Solvation
Dissolution
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Question # 11
According to Raoult's law
Choose an answer
Relative lowering of V.P. is equal to mole fraction of solute
The lowering of V.P. is directly proportional to mole fraction of solute
V.P. of solvent above solution is equal to product of V.P. of pure solvent and mole fraction of solvent ins solution
All of the above
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Question # 12
Partial pressure of a solution component is directly proportional to its mole fraction. This statement is known as
Choose an answer
Henry's law
Raoult's law
Distribution law
Ostwald's dilution law
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Question # 13
The term ebullioscopy is used for
Choose an answer
Depression of freezing point
Elevation in boiling point
Lower of vapour pressure
None of the above
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Question # 14
The osmotic pressure of solution increases if
Choose an answer
Temperature is decreased
Solution constant is increased
Number of solute molecules are increased
Volume is increased
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Question # 15
Solution which distill without change in composition or temperature are called
Choose an answer
Amorphous
Azeotropic mixture
Ideal
Super saturated
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