This set of tough Chemical Process Calculation questions and answers focuses on “Two component Gas-Two component Liquid system-II”.
1. Henry`s law is used primarily for a component whose mole fraction approaches_______
a) 0
b) 0.25
c) 0.50
d) 1.00
View Answer
Explanation: Henry`s law is used primarily for a component whose mole fraction approaches to zero.
2. Henry`s law can be applied to diluted gas dissolved in liquid.
The given statement is
a) Correct
b) Incorrect
c) Can`t predict
d) None of the mentioned
View Answer
Explanation: Henry`s law is used primarily for a component whose mole fraction approaches to zero.
3. For Henry`s law, Pi = HiXi, Here Pi is
a) Partial pressure in the gas phase of the dilute component
b) Vapour pressure in the gas phase of the dilute component
c) Total ambient pressure in the gas phase of the dilute component
d) None of the mentioned
View Answer
Explanation: Pi is the partial pressure in the gas phase of the dilute component.
4. For a dilute solution the relative lowering of vapour pressure is equal to mole fraction of solute. According to which law the statement is correct?
a) Henry`s Law
b) Dalton`s Law
c) Charles Law
d) None of the mentioned
View Answer
Explanation: Raoult’s law, for dilute solutions containing non-volatile solute, the relative lowering of vapour pressure is equal to the mole fraction of solute.
5. Positive deviation showing from Raoult’s law is?
a) Water – hydrochloric acid
b) Acetone – chloroform
c) Water – nitric acid
d) Benzene – methanol
View Answer
Explanation: Benzene – methanol mixture the intermolecular forces of attractions are weaker than those in pure liquids. Hence this mixture shows positive deviation.
6. The escaping tendency of a solvent is measured by its
a) Vapour pressure
b) Partial pressure
c) Ambient pressure
d) None of the mentioned
View Answer
Explanation: The escaping tendency of a solvent is measured by its Vapour pressure.
7. Vapour pressure is dependent on
a) Temperature
b) Pressure
c) Volume
d) None of the mentioned
View Answer
Explanation: Vapour pressure is dependent on Temperature.
8. Vapour pressure measures the concentration of solvent molecules in the ________ phase.
a) Gas
b) Liquid
c) Solid
d) None of the mentioned
View Answer
Explanation: Vapour pressure measures the concentration of solvent molecules in the Gas phase.
9. For an ideal solution the partial vapour pressure of a component in solution is equal to the mole fraction of that component times its vapour pressure. Is the
a) Henry`s Law
b) Dalton`s Law
c) Charles Law
d) Raoult`s LAw
View Answer
Explanation: Raoult’s law states that, for an ideal solution the partial vapour pressure of a component in solution is equal to the mole fraction of that component times its vapour pressure.
10. At high altitude the atmospheric pressure is
a) High
b) Low
c) Same as ground
d) None of the mentioned
View Answer
Explanation: At high altitude the atmospheric pressure is low.
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