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Online Tests
Chemistry Fsc Part 1 Chapter 9 Online Test MCQs With Answers
Question # 1
Melting of ice can be forwarded by the use of.
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LiCl
BeCl2
NaCl
Ag Cl
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Question # 2
Molal boiling constant for water is 0.52
o
C. If 6 g of urea is dissolved in 100 g of water, what will be its boiling point.
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100.52
o
C
-100.52
o
C
100
o
C
99
o
C
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Question # 3
The molarity of 2% w/v NaOH solution is
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2
0.25
0.05
0.5
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Question # 4
A solution of glucose is 10% to volume in which 1 g mole of it is dissolved will be
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1 dm
3
1.8 dm
3
200 cm
3
900 cm
3
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Question # 5
Solubility of which substance decreases by incressing temperature.
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NaNO3
KNO2
NaCl
Ce2(SO4)3
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Question # 6
The vapour pressure of an aqueous solution of glucose is.
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Equal to vapour pressure of water
Independent of temperature
More than vapour pressure of pure water
Less than vapour pressure of pure water
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Question # 7
Unit of mole fraction is
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mol dm-3
mol kg-1
g dm-3
No unit
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Question # 8
Colligative properties are the properties of.
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Dilute solution which behave as nearly ideal solutions
Concentrated solutions which behave as nearly non ideal solutions
Both a and b
Neither a nor b
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Question # 9
The molar boiling point constant is the ratio of the elevation of boiling point to .
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Molarity
Molality
Mole fraction of solvent
Mole fraction of solute
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Question # 10
Azeotrpic mixture of two liquids boils at a lower temperature than either of them, when
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It is saturated
Is shows positive deviation from Raoult's law
It shows negative deviation from Raoult's law
Is is metastable
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Question # 11
The liquid pair which is not completely miscible is
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CH
3
OH and water
Alcohol and water
Phenol and water
Benzene and toluene
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Question # 12
Which one of the following salts dissolved in water to form a solution with a pH greater than 7
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NaCl
CuSO4
Na2CO3
NH4Cl
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Question # 13
A solution of glucose is 10% The volume in which 1 g mole of it dissolved will be.
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1 dm3
1.8 dm3
900 cm3
200 cm3
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Question # 14
When an ionic compound is dissolved in water, it dissociate into positive and negative ions, which are surrounded by H2O molecule, This process is known as.
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Hydrolysis
Hydration
Saturation
solvolysis
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Question # 15
A solution of sucrose is 34.2% The volume of solution containing one mole of solute.
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500 cm3
1000 cm3
342 cm3
3420 cm3
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Question # 16
In a solution 7.8 g of benzene and 46 g of toluene is present The mole fraction of benzene is.
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1/2
1/3
1/5
1/6
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Question # 17
The molal boiling point constant is the ratio of elevation of boiling point to
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Molarity
Mole fraction of solvent
Molality
Mole fraction of solute
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Question # 18
Colligative properties are used to determine the
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Freezing points
Boiling point
Atomic mass of an element
Molar mass of solute
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