Topic: Solutions, Test No.: 04, Total MCQs: 10
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Question 1 |
Acidified
KMnO4 oxidizes oxalic acid to CO2. What is the volume (in
litres) of 10–4m KMnO4 required to completely oxidize 0.5
litres of 10–2 M oxalic acid in acid medium
125 | |
1250 | |
200 | |
20 |
Question 2 |
250 ml of
a sodium carbonate solution contains 2.65 grams of Na2CO3.
10 ml of this solution is added to x ml of water to obtain 0.001 M Na2CO3
solution. What is the value of x in ml?
(Molecular weight of Na2CO3 =106)
(Molecular weight of Na2CO3 =106)
1000 | |
990 | |
9990 | |
90 |
Question 3 |
Volume of
water needed to mix with 10 mL N HCl to get 0.1 N HCl is
90 mL | |
9 mL | |
900 mL | |
1000 mL |
Question 4 |
The density
(in g mL–1) of a 3.60 M sulphuric acid solution that is 29% H2SO4
(molar mass = 98 g mol–1) by mass will be
1.64 | |
1.88 | |
1.22 | |
1.95 |
Question 5 |
The vapour
pressure of pure water at 20°C
is 17.5 mm Hg. If 18 g of glucose (C6H12O6) is
added to 178.2 g of water at 20°C,
the vapour pressure of resulting solution will be
17.325 m Hg | |
17.675 mm Hg | |
15.750 mm Hg | |
16.500 mm Hg |
Question 6 |
6.02 × 1020
molecules of urea are present in 100 mL of its solution. The concentration of
urea solution is
(Avogadro constant, NA = 6.02 × 1023 mol-1)
0.001 M | |
0.01 M | |
0.02 M | |
0.1 M |
Question 7 |
Which has minimum osmotic pressure?
200 mL of 2 M NaCl solution | |
200 mL of 1 M glucose solution | |
200 mL of 2 M urea solution | |
All have same osmotic pressure |
Question 8 |
138 grams
of ethyl alcohol is mixed with 72 grams of water. The ratio of mole fraction of
alcohol to water is
1:4 | |
1:2 | |
3:4 | |
1:1 |
Question 9 |
If a is the degree of dissociation of Na2SO4,
the Van't Hoff factor (i) used for calculating the molecular mass is
1 – a | |
1 + a | |
1 – 2a | |
1 + 2a |
Question 10 |
Molality
of an aqueous solution that produces an elevation of boiling point of 1.00 K at
1 atm pressure
(Kb for water = 0.512 K. Kg . mol–1)
(Kb for water = 0.512 K. Kg . mol–1)
0.512 M | |
0.915 M | |
1.95 M | |
5.12 M |
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