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ECAT Chemistry Chapter 9 Solutions Online Test MCQs With Answers
Question # 1
The solubility of a gas in water depends upon
Choose an answer
Nature of the gas
Temperature
Pressure of the gas
All of the above
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Question # 2
A solution has 92 g of ethyl alcohol, 96 g of methyl alcohol and 90 g of water. Mole percentage of ethyl alcohol in the solution is
Choose an answer
10
20
25
50
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Question # 3
Solutions with same osmotic pressures are called
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Hypertonic
Hypotonic
Isotonic
Normal
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Question # 4
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 # 5
The osmotic pressure of a dilute solution is directly proportional to the
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Diffusion rate of the solute
Ionic concentration
Elevation in boiling point
Flow of solvent from a concentrated to a dilute solution
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Question # 6
A solution of glucose is of methanol in water has vapor pressure :
Choose an answer
Equal that of water.
Equal to that of methanol.
More than that of water.
Less than that f water.
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Question # 7
An azeotropic mixture showing it's positive deviation from Raoult's law, the volume of the mixture is :
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Slightly more than the total volume of the components.
Slightly less than the total volume of the components.
Equal to the total volume of the components.
None of these.
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Question # 8
The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water in
Choose an answer
-1.86
°C
-3.72
°C
+1.86
°C
+3.72
°C
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Question # 9
Aqueous solution of glucose C
6
H
12
O
6
, boils at 100.052°C. The solution contains
Choose an answer
180 grams glucose in 1 kg water
18 grams glucose in 1 kg water
1.8 grams glucose in 1 kg water
3.6 grams glucose in 1 kg
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Question # 10
An azeotropic mixture of two liquids boils at a lower temperature than either of them when lower temperature
Choose an answer
It is saturated
it shows positive deviation from Raoult's law
It shows negative deviation form Raoult's law
It is metastable
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Question # 11
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 # 12
A solution can be
Choose an answer
Dilute and concentrated
Saturated and dilute
Saturated and unsaturated
Supersaturated and saturated
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Question # 13
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 # 14
Dust particles in smoke is a solution of the type
Choose an answer
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 # 15
Which of the following will have the highest boiling point at 1 atm pressure?
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0.1 M NaCl
0.1 M Sucrose
0.1 M BaCl
2
0.1 M Glucose
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Question # 16
To calculate volume of the solvent, we need to know, the :
Choose an answer
Density of solute
Normality of solute
Mass of solute
Molarity of solute
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Question # 17
A solution of two component is called
Choose an answer
Binary solution
Dilute solution
Original solution
Standard solution
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Question # 18
Molarity of pure water is :
Choose an answer
33.3
55.5
44.4
66.6
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Question # 19
The molarity of the solution containing x grams (NH
4
)
2
SO
4
in 500 cm
3
of the solution is 0.6 what is x
Choose an answer
39.6
45.1
40.5
42.7
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Question # 20
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 # 21
The vapour pressure of two liquids 'p' and 'Q' are 80 and 60 torr respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mol of Q would be
Choose an answer
140 torr
20 torr
68 torr
72 torr
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Question # 22
Solutions containing relatively lower concentrations of solute are called :
Choose an answer
Concentrated solutions.
Lighter solutions.
Dilute solutions.
None of above.
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Question # 23
The molarity of toluene solution in benzene is 0.22 if 5 grams of toluene dissolved, then mass of benzene is grams is
Choose an answer
267
260
240
247
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Question # 24
Freezing point depression is measured by
Choose an answer
Beckmann's apparatus
Lands Berger's method
Antifreeze apparatus
All of the above
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Question # 25
The molal depression constant depends upon
Choose an answer
Nature of solute
Nature of solvent
Δ H
solution
Vapour pressure of solution
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Question # 26
3.6% WN solution of HCI has the molairity
Choose an answer
1.0
1.15
0.98
1.98
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Question # 27
Hydrochloric acid available in the laboratory is 36% w/w. The density of HCl solution is 1.19 g cm
-3
. The molarity of HCl solution is
Choose an answer
10.23 moles dm
-3
11.55 moles dm
-3
11.73 moles dm
-3
12.67 moles dm
-3
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Question # 28
A solution is a homogeneous mixture of two or more kinds different :
Choose an answer
Molecular.
Covalent substance
Ionic Substances
Both (a) and (c)
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Question # 29
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 # 30
How many g of dibasic acid (mol. wt. 200) should be present in 100 ml of the aqueous solution to give 0.1 Normality?
Choose an answer
1 g
2 g
10 g
20 g
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Question # 31
10g Of NaOH Has Been Dissolved Per
dm
3
of solution. The morality of solution is :
Choose an answer
0.025 M
1.5 M
0.1 M
.25 M
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