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Online Tests
ECAT Chemistry Chapter 9 Solutions Online Test MCQs With Answers
Question # 1
The amount of solute present in the given amount of solvent is called
Choose an answer
Molarity
Molality
Concentration
Solubility
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Question # 2
Solution may have units
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Molarity
Molality
Mole fraction
All of them
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Question # 3
Which one of the following is used as antifreeze in the radiator
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Methanol
Ethanol
Ethylene glycol
Glycerin
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Question # 4
If the ionic product of a solution is less than the solubility product, the solution is
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Supersaturated
Unsaturated
Ideal
Saturated
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Question # 5
Dust particles in smoke is a solution of the type
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Liquid is solute and solid is solvent
Solid is solute and liquid is solvent
Solid is solute and gas is solvent
Gas is solute and solid is solvent
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Question # 6
0.5 M of H
2
SO
4
is diluted from 1 litre to 10 litre, normality of resulting solution is
Choose an answer
1 N
0.1 N
10 N
11 N
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Question # 7
In which type of following solutions the total volume of solutions may not be necessarily equal to sum of volumes of solute and solvent ?
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Percentage volume/volume
Percentage volume/weight
Percentage weight/volume
Percentage weight/weight
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Question # 8
In azeotropic mixture showing negative deviation form Raoult's law show
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Higher b.p. than either
Lower b.p. than either
No change in b.p.
None of these
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Question # 9
The weight of pure NaOH required to prepare 250 cm
3
of 0.1 N solution is
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4 g
1 g
2 g
5 g
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Question # 10
If
α us the degree of dissociation of Na
2
SO
4
the vant Hoff's factor (1) used for calculating the molecular mass is
Choose an answer
1 +
α
1 -
α
1 + 2
α
1 - 2
α
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Question # 11
Colligative properties are the properties of :
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Dilute solutions which behave as nearly ideal solutions.
Concentrated solutions which behave as nearly non-ideal solutions.
Both(i) and (ii)
Neither (i) nor (ii)
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Question # 12
Which statement is not true. A solution is a homogeneous mixture of
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Two ionic substance like NaCl and HCl
Two molecular substances sugar and water
A solute and a solvent 1% NaHCO
3
in water
NaCl and sand
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Question # 13
If liquids A and B form an ideal solution
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The enthalpy of mixing is zero
The entropy of mixing is zero
The free energy of mixing is zero
The free energy as well as the entropy of mixing are each zero
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Question # 14
0.1 molar glucose (C
6
H
12
O
6
) solution has the % W/N
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1.8%
18%
0.18%
2.8%
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Question # 15
The depression of freezing point is directly proportional to
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Mole fraction of the solution
Molarity of the solution
Molality of the solution
Molarity of the solvent
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Question # 16
As compared to molar solution, in the molal solution the quantity of solvent is :
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Comparatively lesser
More or less equal
Comparatively greater
Very large
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Question # 17
10g of NaOH has been dissolved per kg of solvent. The molality of solution is :
Choose an answer
.25 m
1.5 m
.5 m
2.5 m
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Question # 18
10% aqueous solution of NaCI has molarity
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1.7 M
2.7 M
0.17 M
3.7 M
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Question # 19
Units of molarity are
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gm/lit
mol/lit
kg/lit
None of these
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Question # 20
A solutiion of 0.5 mole camphor in 100 grmas chloroform (K
b
= 0.322) has rise in boiling point than that of chloroform by
Choose an answer
0.81°C
1.61°C
1.81°C
0.61°C
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Question # 21
If 5.85 of NaCI are dissolved in 90g of water the mole fraction of NaCI is
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0.1
0.01
0.2
0.0196
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Question # 22
The temperature at which the vapour pressure of a liquid becomes equal to external pressure is
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Melting point
Sublimation point
Inversion point
Boiling point
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Question # 23
Which inorganic precipitate acts as semipermeable membrane?
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Calcium sulphate
Barium oxalate
Nickel phosphate
Copper ferrocyanide
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Question # 24
Number of moles of the solute dissolved per dm
3
of the solution is knows as
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Molarity
Formality
%age
None of these
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Question # 25
Freezing point depression is measured by
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Beckmann's apparatus
Lands Berger's method
Antifreeze apparatus
All of the above
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Question # 26
1.0 g pure calcium carbonate was found to require 50 ml of dilute HCl for complete reaction. The strength of HCl solution is given by
Choose an answer
4 N
2 N
0.4 N
0.2 N
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Question # 27
The relative lowering of vapour pressure is equal to the mole fraction of the solute is statement of
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Rault law
Henry law
Dalton law
Grahms law
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Question # 28
Which one of the following mixture shows positive deviation form Rault's law and forms an azetrope with minimum boiling point
Choose an answer
Methanol + CCI
4
Methanol + acetone
Ether + HCI
Acetone + chloroform
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Question # 29
A one thousand dm
3
sample of water contains one gram of iron (iii) ions what is the concentration in parts per million of Fe
3f
(eq) in parts per million
Choose an answer
0.001
0.01
0.1
1.0
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Question # 30
Which one of the following has discontinuous solubility curve
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CaCI
2
6H
2
O
NaCI
KCI
NaNO
3
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