Chemistry - Solutions
Exam Duration: 45 Mins Total Questions : 30
Which of the following solutions has the highest boiling point?
- (a)
0.1 M glucose
- (b)
0.1 M \(BaCl_2\)
- (c)
0.1 M NaCl
- (d)
0.1 Urea
The freezing point of the solution with increasing concentration of glucose will be as
- (a)
1%>2%>3%>10%
- (b)
10%>3%>2%>1%
- (c)
1%>2%>2%>10%
- (d)
10%>2%>3%>2%
what is the mole fraction of water in a solution containing 1 mole of water in 4 moles of alcohol?
- (a)
0.2
- (b)
0.4
- (c)
0.6
- (d)
0.8
A solution contains 410.3 g of \(H_2SO_4\)per litre of solution at 20 C. If the density of \(H_2SO_4\)is 1.243 ml , the molarity of the soltion is
- (a)
3.00
- (b)
4.187
- (c)
3.187
- (d)
2.187
Frezing point is highest in which case of the following ?
- (a)
\(1 M C_6H_5NH_3Cl\)
- (b)
\(1 M Ca((NO_3)_3\)
- (c)
\(1 M La(NO_3)_2\)
- (d)
1 M glucose
Which one of of the following changes with temperature?
- (a)
Molality
- (b)
Mole fraction
- (c)
Normality
- (d)
Mass-percent
On mixing 20 ml of acetone with 60 ml chloroform, the total volume of the solution would be
- (a)
>80 ml
- (b)
<80 ml
- (c)
80 ml
- (d)
None of the above
Which one of the following conditions is not by an ideal solution?
- (a)
raoult's law isobeyed
- (b)
\(\triangle { H }_{ mix } = 0\)
- (c)
\(\triangle V_{mix} = 0 \)
- (d)
All the above
Reverse osmosis is used for
- (a)
getting pure water by desalination of sea water
- (b)
preparing aerated water
- (c)
purification of colloidal solution
- (d)
None of the solution
The benxene (v.p. = 268 mm) and ethylene chloride (v.p.= 236 mm) form ideal solution. The total pressure made by dissolving 2 moles benzene and 3 moles of ethyene chloide would be approximately
- (a)
249 mm
- (b)
255 mm
- (c)
270 mm
- (d)
504 mm
Molar depression constant for water is \(1.86^o C\).The freezing point of a 0.05 molal solution of non-electrolyte in water is
- (a)
\(-1.86^o C\)
- (b)
\(??-0.93^O C\)
- (c)
\(-0.093^0 C\)
- (d)
\(0.93^0 C\)
The elevation in boiling point would be highest for
- (a)
0.10 M glucose
- (b)
0.08 M barium chloride
- (c)
0.15 M potassium chloride
- (d)
0.06 M calcium nitrate
The molal depression constant \(k_f\)of water is \(1.86^0 C\)34.2 g of sucrose and 12 g of Urea dissolved 1000 g of water, the freezing point of resultant solution would be
- (a)
\(-0.558^o C\)
- (b)
\(-2.8^O C\)
- (c)
\(-9.3^O C\)
- (d)
\(-1.86^O C\)
The molarity of 800 g of pure water is
- (a)
5.55 M
- (b)
55.5 M
- (c)
555 M
- (d)
NONE OF THESE
A substance will be deliquecent if its vapour pressure is
- (a)
equal to the atmospheric pressure
- (b)
less than that of water vapour in air
- (c)
equal to that of water of vapour in air
- (d)
greater than that of water vapour in air
Freezing point of an aqueous solution is - \(186^o C\). Elevation of boiling point of same solution would be? (Given kf = \(1.86^0\) and kb = )
- (a)
\(0.186^o C\)
- (b)
\(0.0512^O C\)
- (c)
\(0.092^O C\)
- (d)
\(0.2372^O C\)
Match the following and choose the correct option.
Column I | Column II | ||
A. | Molarity | p. | mol/kg |
B. | Normality | q. | mol/L |
C. | Molality | r. | gram equivalent/L |
D. | NaCl | s. | i=2 |
- (a)
A B C D q r p s - (b)
A B C D p q s r - (c)
A B C D r q s p - (d)
A B C D s p q r
How many grams of H2SO4 is to be dissolved to prepare 200 mL aqueous solution having concentration of H3O+ ions is 1 M at 25o C temperature ?
- (a)
19.6 g
- (b)
0.98 g
- (c)
4.9 g
- (d)
9.8 g
What is the molality of a solution in which 18 g glucose (mol. wt. =180) is dissolved in 500 g of H2O?
- (a)
0.5 m
- (b)
0.2 m
- (c)
2 m
- (d)
1 m
Considering the formation, breaking and strength of hydrogen bond, predict which of the following mixture will show a positive deviation from Raoult's law?
- (a)
Methanol and acetone
- (b)
Chloroform and acetone
- (c)
Nitric acid and water
- (d)
Phenol and aniline
Colligative properties of a solution depend upon
- (a)
nature of solute only
- (b)
nature of both solute and solvent
- (c)
number of solute particles
- (d)
number of solvent particles
In comparison to 0.01 M solution of glucose, the depression in freezing point of 0.01 M MgCl2 is ......
- (a)
the same
- (b)
about twice
- (c)
about three times
- (d)
about six times
Which of the following statements is false?
- (a)
Units of atmospheric pressure and osmotic pressure are the same
- (b)
In reverse osmosis, solvent molecules move through a semipermeable membrane from a region of lower concentration of solute to a region of higher concentration.
- (c)
The value of molal depression constant depends upon the nature of solvent
- (d)
relative lowering of vapour pressure is a dimensionless quantity
An unripe mango placed in a concentrated salt solution to prepare pickle, shrivels because
- (a)
it gains water due to osmosis
- (b)
it loses water due to reverse osmosis
- (c)
it gains water due to reverse osmosis
- (d)
it loses water due to osmosis
Choose the factor(s) that affect the solubility of a gaseous solute in the fixed volume of liquid solvent.
I. Nature of solute
II. Temperature
III. Pressure
- (a)
I and III at constant T
- (b)
I and II at constant p
- (c)
II and III
- (d)
Only III
Kf of water is 1.86 K Kg mol-1 . If your automobiles radiator holds 1.0 kg of water, how many grams of ethylene glycol (C2H6O2) you must add to get the freezing point of the solution lowered to -2.8o C ?
- (a)
72 g
- (b)
93 g
- (c)
39 g
- (d)
27 g
The density of a solution prepared by dissolving 120 g of urea (mol. mass = 604) in 1000 g of water is 1.15 g/mL. The molarity of the solution is
- (a)
0.50 M
- (b)
1.78 M
- (c)
1.02 M
- (d)
2.05 M
Ethylene glycol is used as an antifreeze in a cold climate. Mass of ethylene glycol which should be added to 4 kg of water to prevent it from freezing at water to prevent it from freezing at -6o C will be (Kf for water = 1.86 K kg mol-1 and molar mass of ethylene glycol = 62 mol-1)
- (a)
800.00 g
- (b)
204.30 g
- (c)
400.00 g
- (d)
304.60 g