General
✓✗The volume of 0.5 M H2SO4 needed to prepare 200 mL of 0.1 M H2SO4 is
- 20 mL
- 40 mL
- 10 mL
- 100 mL
General
✓✗An ideal solution is formed when its components
- have no volume change on mixing
- have no enthalpy change on mixing
- have both the above characteristics
- have high solubility
General
✓✗Henry's law is NOT obeyed well by
- N2 dissolving in water
- NH3 dissolving in water
- O2 dissolving in water
- He dissolving in water
General
✓✗For a solution showing positive deviation from Raoult's law,
- ΔmixH < 0 and ΔmixV > 0
- ΔmixH < 0 and ΔmixV < 0
- ΔmixH = 0 and ΔmixV = 0
- ΔmixH > 0 and ΔmixV > 0
General
✓✗The vapour pressure of water at 293 K is 17.535 mm Hg. 25 g of glucose (molar mass 180 g mol−1) is dissolved in 450 g of water. The vapour pressure of the solution is
- 17.00 mm Hg
- 15.80 mm Hg
- 17.44 mm Hg
- 17.54 mm Hg
General
✓✗Molality of a solution is defined as the number of moles of solute dissolved in
- 1 kg of solvent
- 1 L of solution
- 1 L of solvent
- 1 kg of solution
General
✓✗The mole fraction of the solute in an aqueous solution is 0.1. Its molality is
- 5.56 m
- 6.17 m
- 55.60 m
- 0.10 m
General
✓✗In the vapour pressure−composition plot of an ideal binary solution, the total vapour pressure varies
- exponentially with mole fraction
- as a parabola with a minimum
- as a parabola with a maximum
- linearly with the mole fraction of either component
General
✓✗A maximum boiling azeotrope is formed by solutions showing
- large negative deviation from Raoult's law
- ideal behaviour
- large positive deviation from Raoult's law
- no interaction between components
General
✓✗Common salt is spread on icy roads in cold countries because it
- lowers the freezing point of water
- reacts with ice
- raises the freezing point of water
- increases the boiling point of ice
General
✓✗Helium is used in the oxygen tanks of scuba divers because
- it increases the solubility of nitrogen
- it is more soluble in blood than nitrogen
- it is much less soluble in blood than nitrogen
- it reacts with oxygen
General
✓✗Assertion: The vapour pressure of a solution of ethanol and water is higher than predicted by Raoult's law.
Reason: Ethanol and water form a maximum boiling azeotrope.
Reason: Ethanol and water form a maximum boiling azeotrope.
- Both Assertion and Reason are true and Reason is the correct explanation of Assertion
- Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- Assertion is true but Reason is false
- Both Assertion and Reason are false
General
✓✗What is the molarity of an H2SO4 solution that has a density of 1.84 g cm−3 at 35 °C and contains 98% H2SO4 by mass?
- 18.4 M
- 4.18 M
- 18 M
- 8.14 M
General
✓✗Which one of the following is incorrect for an ideal solution?
- ΔHmix = 0
- ΔGmix = 0
- ΔP = Pobs − Pcalculated by Raoult's law = 0
- ΔUmix = 0
General
✓✗Which concentration term is preferred for expressing concentrations in colligative property calculations involving temperature changes?
- Mass by volume percentage
- Molality
- Molarity
- Normality