JEE Questions for Chemistry Solutions Quiz 14 - MCQExams.com

Boiling point of an aqueous solution of 0.05m FeCl3 is 100.087o C; then, what will be the value of Van’t Hoff factor i ? (Kb = 0.513o C – kg - mole-1)
  • 4
  • 3.4
  • 2.5
  • 2.8
Difference of boiling point and freezing point of an aqueous solution of glucose is 104o C at 1 bar pressure; then what will be the molality of the solution ? (Kb = 0.513o and K+” = 1.86o C – kg - mole-1)
  • 2.373 m
  • 1.05 m
  • 2.151 m
  • 1.68 m
Difference of boiling point and freezing point of 0.2 m acetic acid prepared in benzene is 75.7o C; then, state the value of Van’t Hoff factor i ? (For benzene, Kb = 2.65oC – kg – mol–1, Kf = 5.12o C – kg – mol– 1, Tb = 80o C, Tf = 5.5o C)
  • 1.44
  • 0.64
  • 0.83
  • 0.77
Difference in boiling point and freezing point of 10 kg aqueous solution of urea is 100.2372o C; then what quantity of urea dissolved in the solution ? (Kb = 0.513o and K+” = 1.86o C – kg - mole-1)
  • 59.64
  • 38.946
  • 51.65
  • 40.5
500 ml solution of HCl is prepared by dissolving 14.6 gm HCl in water. What will be the molarity of HCl in the solution ? (Molecular weight of HCl = 36.5 gm/mole )
  • 0.4M
  • 0.3M
  • 0.8M
  • 0.3M
What would be the molality of the solution prepared by dissolving 60 gm NaOH in 1.5 kg water ? (Molecules weight of NaOH = 40 gm/mole)
  • 0.5M
  • 1.0M
  • 0.8M
  • 0.4M
What would be the molarity of 3.0 N H2SO4 solution ?
  • 6M
  • 1.5M
  • 3M
  • 1M
What quantity of NaOH is needed to prepare 1.2 m, 800 ml NaOH solution ?
  • 3.84
  • 60
  • 42
  • 38.4
What would be the molarity and normality of solution prepared by dissolving 19.6 gm H2SO4 in dissolved water to prepare 800 ml solution ? (Molecular weight of H2SO4 is 98 gm/mole)
  • 0.5 M, 0.25 N
  • 0.25 M, 0.125 N
  • 0,25 M, 0.5 N
  • 0.125 M, 0.25 N
What amount of H2SO4 required to prepare 2 litre of 0.5 N H2SO4 solution ? (Molecular weight of H2SO4 is 98 gm/mole)
  • 98 gm
  • 24.5 gm
  • 49 gm
  • 73.5 gm
What will be the concentration of solution prepared by dissolving 50 gm glucose in 200 gm water ?
  • 25 % w/w
  • 20 % w/w
  • 35 % w/w
  • 15 % w/w
What quantity of urea required to prepare 20 % w/w solution having weight 150 gm ?
  • 20 gm
  • 40 gm
  • 10 gm
  • 30 gm
What will be the mole-fraction of ethanol in solution, prepared by dissolving 9.2 gm ethanol in 900 gm water ? (Molecular weight of water and ethanol are 18 and 48 gm/mole respectively)
  • 0.04
  • 0.004
  • 0.4
  • 0.0004
What will be the mole-fraction of water and NaOH respectively, when 260 gm NaOH dissolved in 1.8 kg water ? (M.W of water NaOH = 18440)
  • 0.96, 0.4
  • 0.0962, 0.38
  • 0.0962, .038
  • 0.962, 0.0038
What would be the mole-fraction of solute in an aqueous solution of a substances heaving strength 4.5 m ?
  • 0.75
  • 0.075
  • 0.45
  • 0.045
The density of 98% w/w H2SO4 solution is 1.8 gm/mole then, molarity of the solution is -
  • 20 M
  • 10 M
  • 18 M
  • None of these
Molarity and molality of an aqueous solution of H2SO4 are 1.56 (M) and 1.8 (M) respectively; then, water will be the density of the solution ?
  • 1.835 gm/ml
  • 1.55 gm/ml
  • 1.02 gm/ml
  • 1.725 gm/ml
A solution is prepared from A, B, C and D mole-fraction of A, B and C are 0.1, 0.2 and 0.4 respectively then, mole-fraction of D is -
  • 0.2
  • 0.1
  • 0.3
  • 0.4
The density of 4 M H2SO4 solution is 1.992 gm/ml then, what will be the molality of the solution ? (Molecular weight of H2SO4 is 98 gm/mole)
  • 3M
  • 3.5M
  • 1.2M
  • 0.4M
Molarity of 1.2 N aqueous solution of AlCl3 is -
  • 3.6m
  • 2.4m
  • 1.2m
  • 0.4m
What will be the molality of the solution prpared using 500 gm of 25 % w/w NaOH and 500 gm of 15 % w/w NaOH solution ? (Molecular weight of NaOH = 40 gm/mole)
  • 12.74 m
  • 6.25 m
  • 9 m
  • 5 m
What wiil be the molality of solution prepared by taking 25 % w/w NaOH and 15 % w/w NaOH solution ? (Molecular weight of NaOH = 40 gm/mole)
  • 12.74 m
  • 5.5 m
  • 9 m
  • 4 m
The density of 2.5 M NaOH solution is 1.15 gm/ml; then, which of the following alternative is correct for molarity and molality ?
  • M > m
  • M < m
  • M = m
  • can ’t b e predicted
Which of the following is correct for an ideal solution ?
  • “H = 0, “V = 0, “S = 0
  • “H `” 0, “V = 0, “S = 0
  • “H = 0, “V = 0, “S `” 0
  • “H = 0, “V `” 0, “S = 0
Boiling point of Aqueous solutions of 0.05 m ABC and 0.02 m X2Y3 are same at 1 bar pressure; then, what will be the values of Van’t Hoff factor (i) for solute in both the solutions ?
  • 1.04, 5.1
  • 1.9, 4.75
  • 1.2, 3.4
  • 1.5, 3.7
Which of the following substances having concentration of aqueous solution 1% w/w, possesses higher boiling point ? (Molecular weight of Kcl, BaCl2, glucose and Al2(SO4)3 are 74.5, 208, 342 gm’mole respectively) (Assume that inonic solids dissociates completely in their aqueous solution)
  • KCl
  • BaCl2
  • glucose
  • Al2(SO4)3
Molecular weight of biomolecules such as protein can be determined by ______ method.
  • osmotic pressure measurement
  • Depression in freezing point measurement
  • Elevation in boiling point measurement
  • Vapour pressure measurement
In the references of the following graph, UR -Oy = __________.
Chemistry-Solutions-7210.png
  • (SU -VW)QU
  • VU(VW – QY)
  • (VW – QY)QU
  • VW(QV – VU)
What will be the elevation in boiling point of an aqueous solution of 0.5 m NaCl ? ( i = 1.8)
  • 2.04, 5.1
  • 1.9, 4.57
  • 1.2, 3.4
  • 1.4, 3.7
When 2 gm phenol id dissolve in 100gm benzene; then depression in freezing point is 0.69 K. If its association is dimeric, then calculate its degree of association (X). Molar depression constant for solvent is 5.12 K - kg - mole-1.
  • 0.0734
  • 0.374
  • 0.00734
  • 0.734
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