Solutions  MCQs

MCQs of Solutions

Showing 101 to 110 out of 157 Questions
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101.
Freezing point of urea solution is -0.6°C. How much urea is required to be dissolved in 3 kg water ?[M(urea) = 60 g mol-1, Kf = 1.5°C Kg mol-1]
(a) 2.4 g
(b) 3.6 g
(c) 6.0 g
(d) 72 g
Answer:

Option (d)

102.
Which of the following aqueous solutions will have maximum osmotic pressure at constant temperature ?
(a) 1 m H2SO4(aq)
(b) 1 m NaCl(aq)
(c) 1 M H2SO4(aq)
(d) 1 M NaCl(aq)
Answer:

Option (c)

103.
If osmotic pressure of a solution at 27°C is 0.82 bar, what will be molarity of solution ?
(a) 0.33M
(b) 0.033M
(c) 3.3M
(d) 0.066M
Answer:

Option (b)

104.
Camphor is often used in molecular mass determination because
(a) it is readily available.
(b) it has a very high cryoscopic costant.
(c) it is volatile.
(d) it is solvent for organic substances.
Answer:

Option (b)

105.
A solution of urea (mol.mass 56 g mol-1) boils at 100.18°C at the atmospheric pressure.If Kf and Kb for water are 1.86 and 0.512 K kg mol-1 respectively,the above solution will freeze at _____ .
(a) 0.654°C
(b) -0.654°C
(c) 6.54°C
(d) -6.54°C
Answer:

Option (b)

106.
A solution of acetone in ethanol
(a) shows a positive deviation from Raoult's law.
(b) behaves like a non ideal solution.
(c) obeys Raoult's law
(d) shows a negative deviation from Raoult's law.
Answer:

Option (a)

107.
The average osmotic pressure of human blood is 7.8 bar at 37°C. What is the concentration of an aqueous NaCl solution that could be used in the blood stream ?
(a) 0.16 mol/L
(b) 0.31 mol/L
(c) 0.60 mol/L
(d) 0.45 mol/L
Answer:

Option (b)

108.
Kb for a solvent is the ratio of elevation in boiling point to _____ .
(a) mole fraction of solute
(b) molality
(c) molarity
(d) normality
Answer:

Option (b)

109.
What will be the charge in the boiling point of water if we go to a very high place ?
(a) Decreases
(b) Increases
(c) Remains constant
(d) First decreases and then increases
Answer:

Option (a)

110.
What is the correct descending order of freezing point in the following ?
(a) 0.05 M AgNO3 > 0.04 M Na2SO4 > 0.14 M urea > 0.075 M ZnSO4
(b) 0.04 M Mn(No3)2 > 0.14 M Glucose > 0.075 M FeSO4 > 0.05 M HCOOK
(c) 0.075 M MgSO4 > 0.14 M Sucrose > 0.04 M Ca(NO3)2 > 0.05 M KCl
(d) 0.075 M CdSO4 > 0.05 M CH3COONa > 0.14 M urea > 0.04 M NiCl2
Answer:

Option (a)

Showing 101 to 110 out of 157 Questions
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