Solutions  MCQs

MCQs of Solutions

Showing 111 to 120 out of 157 Questions
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111.
Under which of the following conditions, will the solute dissolve spontaneously in water ?
(a) ΔH(hydration) > ΔH(lattice)
(b) ΔH(hydration) < ΔH(lattice)
(c) ΔH(hydration) = ΔH(lattice)
(d) ΔH(hydration) + ΔH(lattice) = 0
Answer:

Option (a)

112.
When 0.6 g urea is dissolved in 200 g H2O, the boiling point elevates by 0.5°C. Calculate molal elevation constant for the solution.
(a) 1.0 K kg mol-1
(b) 0.10 K kg mol-1
(c) 10 K gram mol-1
(d) 10 K kg mol-1
Answer:

Option (d)

113.
Which of the following phenomena will be observed if the concentration of a salt solution is increased ?
(a) Boiling point increases and vapour pressure decreases.
(b) Boiling point decreases and vapour pressure increases.
(c) Freezing point decreases and vapour pressure increases.
(d) Freezing point increases and vapour point decreases.
Answer:

Option (a)

114.
For which of the following pairs of substances, Van't Hoff factor (i) is identical of both the solutes (substances) ?
(a) [Co(NH3)6]Cl2 and [Fe(NH3)4Cl2] NO3
(b) K4 [Fe(CN)6] and K2SO4 · Al2(SO4)3 · 24H)2O
(c) FeSO4 (NH4)2SO4 · 6H2O and K2SO4 · MgSO4 · 6H2O
(d) K3[Fe(CN)6] and C6H5 NH3+Cl-
Answer:

Option (c)

115.
What is the mathematical formula for Boyle-Van't Hoff law ?
(a) p ∝ C
(b) p ∝ nV
(c) p ∝ 1V
(d) π ∝ nV
Answer:

Option (d)

116.
What sugar is dissolved in water, what is the value of Van't Hoff factor (i) for the solution ?
(a) 1
(b) 0.5
(c) 2
(d) 0.4
Answer:

Option (a)

117.
Which of the following is the false statement ?
(a) According to Raoult's law, vapour pressure of the solution varies directly as the mole fraction of the solvent.
(b) The equation for the osmotic pressure (π) is π=CRT, where C is molarity of the solution.
(c) The correct order of osmotic pressure of 0.01 M aqueous solution of each given substance to BaCl2 > KCl > CH3COOH > Sucrose
(d) Two solutions of sucrose having the same molality but different solvents have identical depressions in freezing point.
Answer:

Option (d)

118.
Which of the following expresses the osmotic pressure of solution ? (π = Osmotic pressure, C = Concentration of solution)
(a) π = RTC
(b) π = CTR
(c) π = CRT
(d) π = CRT
Answer:

Option (c)

119.
Which of the following processes is adopted to turn sea water into potable water ?
(a) Osmosis
(b) Reverse osmosis (RO)
(c) Precipitation
(d) Peptization
Answer:

Option (b)

120.
Which law explains the following statement ?

"Solutions having identical volume and number of particles possess identical osmotic pressure ".

(a) Boyle-Van't Hoff law
(b) Raoult's law
(c) Henry's law
(d) Avogadro-Van't Hoff law
Answer:

Option (d)

Showing 111 to 120 out of 157 Questions
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