JEE Questions for Chemistry Solutions Quiz 2 - MCQExams.com

What is the mole fraction of the solute in a 1.00 m aqueous solution ?
  • 0.177
  • 1.770
  • 0.0354
  • 0.0177
10 cm3 of 0.1 N monobasic acid requires 15 cm3 of sodium hydroxide solution whose normality is
  • 1.5 N
  • 0.15 N
  • 0.066 N
  • 0.66 N
2 N HCl solution will have same molar concentration as a
  • 4.0 N H2 SO4
  • 0.5 N H2 SO4
  • 1 N H2 SO4
  • 2 N H2 SO4
What is the molality of pure water ?
  • 1
  • 18
  • 55.5
  • None of these
Which one of the following concentration units is independent of temperature ?
  • Normality
  • Molarity
  • Molality
  • ppm
The volume of water to be added to 100 cm3 of 0.5 N H2SO4 to get decinormal concentration is
  • 400 cm3
  • 450 cm3
  • 500 cm3
  • 100 cm3
Molarity of a given orthophosphoric acid solution is 3 M. It's normality is
  • 9 N
  • 0.3 N
  • 3 N
  • 1N
Volume of 0.6 M NaOH required to neutralise 30cm3 of 0.4 M HCl is
  • 20 cm3
  • 40 cm3
  • 45 cm3
  • 30 cm3
138 g of ethyl alcohol is mixed with 72 g of water. The ratio of mole fraction of alcohol to water is
  • 3 : 4
  • 1 : 2
  • 1 : 4
  • 1 : 1
One part of solute in one million parts of solvent is expressed as
  • ppm
  • mg/100 cc
  • g/L
  • g/100 cc
The molarity of the solution obtained by dissolving 2.5g of NaCl in 100 mL of water is
  • 0.00428 moles
  • 428 moles
  • 0.428 moles
  • 0.0428 moles
To neutralise completely 20 mL of 0.1 M aqueous solution of phosphorous acid (H3PO3), the volume of 0.1 M aqueous KOH solution required is
  • 10 mL
  • 20 mL
  • 40 mL
  • 60 mL
How many grams of dibasic acid (mol. wt.should be present in 100 mL of the aqueous solution to give 0.1 N ?
  • 10 g
  • 20 g
  • 2 g
  • 1 g
A 5 molar solution of H2 SO4 is diluted from 1 L to 10 L. What is the normality of the solution?
  • 0.25 N
  • 1 N
  • 2 N
  • 7 N
Volume of water needed to mix with 10 mL solution of 1 N HCl to get 0.1 N HCl is
  • 900 mL
  • 9 mL
  • 90 mL
  • 100 mL
Equal moles of water and urea are taken in a flask. What is mass percentage of urea in the solution?
  • 23.077 %
  • 230.77 %
  • 2.3077 %
  • 0.23077 %
An aqueous solution of glucose is 20% in strength. The volume in which 1 g-mole of it is dissolved will be
  • 9L
  • 1.8L
  • 8L
  • 0.9L
5 L of a solution contains 25 mg of CaCO3. What is its concentration in ppm ? (mol. wt. of CaCO3 is 100)
  • 25
  • 1
  • 5
  • 2500
Molarity of 0.2 N H2 SO4 is
  • 0.2
  • 0.4
  • 0.6
  • 0.1
How many moles of Al2(SO4 )3 would be in 50 g of the substance ?
  • 0.083 mol
  • 0.952 mol
  • 0.481 mol
  • 0.140 mol
The volume of water to be added to N/ 2 HCl to prepare 500 cm3 of N/ 10 solution is
  • 450 cm3
  • 100 cm3
  • 45 cm3
  • 400 cm3
Molar solution means 1 mole of solute present in
  • 1000 g of solvent
  • 1 L of solvent
  • 1 L of solution
  • 1000 g of solution
Vapour pressure in mm Hg of 0.1 mole of urea in 180 g of water at 25° C is (the vapour pressure of water at 25° C is 24 mm Hg)
  • 2.376
  • 20.76
  • 23.76
  • 24.76
Which of the following will show a negative deviation from Raoult's law?
  • Acetone-benzene
  • Acetone-ethanol
  • Benzene-methanol
  • Acetone-chloroform
Vapour pressure of pure A =100 torr, moles = 2; vapour pressure of pure B = 80 torr, moles = 3. Total vapour pressure of the mixture is
  • 440 torr
  • 460 torr
  • 180 torr
  • 88 torr
Which one of the following is not correct for an ideal solution ?
  • It must obey Raoult's law
  • ∆H = 0
  • ∆V = 0
  • ∆H = ∆V ≠ 0
Which one of the following solutions exhibits the maximum elevation in boiling point?
  • 0.1 m NaCl
  • 0.1 m FeCl3
  • 0.1 m CaCl2
  • 0.1 m BaCl2
The temperature at which the vapour pressure of a liquid becomes equal to external (atmospheric) pressure is its
  • melting point
  • sublimation point
  • inversion point
  • critical temperature
  • boiling point
1.2% NaCl solution is isotonic with 7.2% glucose solution. What will be the van't Hoff factor `i ' for NaCl ?
  • 0.5
  • 1
  • 2
  • 6
The relative lowering of vapour pressure of an aqueous solution containing a non-volatile solute is 0.0125. The molality of the solution is
  • 0.70
  • 0.30
  • 0.125
  • 0.07
0:0:1


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