Solutions  MCQs

MCQs of Solutions

Showing 131 to 140 out of 157 Questions
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131.
What will be the ratio of depression of freezing point for 0.01 M aqueous solutions of respectively urea, sodium chloride and sodium sulphate ?
(a) 1 : 1 : 1
(b) 1 : 2 : 3
(c) 1 : 2 : 4
(d) 2 : 2 : 3
Answer:

Option (b)

132.
A mixture of alcohol and water contains 54% by weight. What is the mole fraction of ethanol ?
(a) 0.25
(b) 0.40
(c) 0.5
(d) 0.66
Answer:

Option (a)

133.
At 300 K temperature, beaker A containing 0.02 M solution of urea and beaker B containing 0.002 M solution of sugar are separated by semipermiable membrane with respect to water. On which beaker how much pressure should be applied to prevent osmosis ? Molecular weight of urea = 60 g/mol and molecular weight of sugar= 342 g/mol. R = 0.8082 L atm. mol-1 k-1 .
(a) 0.4428 atm. on beaker B
(b) 0.4920 atm. on beaker A
(c) 0.4920 atm. on beaker B
(d) None of the above
Answer:

Option (b)

134.
What is the mass of the solute ( molar mass = 60 g/mole) required to be dissolved in 180 g water so that 10% decrease in vapour pressure of water is recorded ?
(a) 30 g
(b) 60 g
(c) 120 g
(d) 18 g
Answer:

Option (b)

135.
The components A and B in a solution are volatile liquids. At 25°C, P°A = 0.64 bar and P°B = 0.84 bar. If mole fraction of B is 0.25, what will be the total vapour pressure of the solution ?
(a) 0.96 bar
(b) 0.69 bar
(c) 0.49 bar
(d) 0.39 bar
Answer:

Option (b)

136.
At 25°C, CO2 dissolved in 900 ml water exerts 2 × 10-8 bar pressure. If Kh = 6.02 × 10-4 bar, what will be the mass of CO2 in such 12 litre solution ? Molar mass of CO2 = 44 g/mole
(a) 9.74 g
(b) 0.974 g
(c) 7.94 g
(d) 0.794 g
Answer:

Option (b)

137.
Molarity of 6 N hypophosphorous acid is 6. It means that _____ .
(a) basicity of acid is 6
(b) basicity of acid is 1
(c) N and M are always same for any acid
(d) molarity of acid is also 6
Answer:

Option (b)

138.
10 ppm hardness of Ca2+ in water means _____ .
(a) 0.001 g CaCl2 is present in 1 kg water
(b) 10 g CaCl2 is present in 1000 g water
(c) 0.01 g CaCl2 is present in 1 kg water
(d) 0.1 g CaCl2 is present in 10,000 g water
Answer:

Option (c)

139.
What will be the normality of 1 M KMnO4 solution ?
(a) 0.1 N
(b) 2 N
(c) 0.5 N
(d) 5 N
Answer:

Option (d)

140.
Which of the following 1 litre solutions, has the highest number of moles of solute ?
(a) 6 N H2SO4
(b) 2 N HClO4
(c) 6 N H3PO4
(d) 2 N HNO3
Answer:

Option (a)

Showing 131 to 140 out of 157 Questions
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