Chemical Engineering Questions and Answers – Vapor-Liquid Equilibria in Binary Systems

This set of Chemical Engineering Multiple Choice Questions & Answers focuses on “Vapor-Liquid Equilibria in Binary Systems”.

1. What is the partial pressure of a 40% gas in a system with vapor pressure 1 mm Hg?
a) 0.2 mm Hg
b) 0.4 mm Hg
c) 0.6 mm Hg
d) 0.8 mm Hg
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2. What is the vapor pressure of 50% gas in a system with partial pressure 2 mm Hg?
a) 1 mm Hg
b) 2 mm Hg
c) 4 mm Hg
d) 8 mm Hg
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3. What is the fraction of gas in a system with partial pressure 2 mm Hg and vapor pressure 5 mm Hg?
a) 0.4
b) 0.5
c) 0.6
d) 0.8
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4. What is the partial pressure of 20% gas in a system with vapor pressure 10 mm Hg?
a) 2 mm Hg
b) 10 mm Hg
c) 50 mm Hg
d) 100 mm Hg
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5. What is the vapor pressure of 40% gas in a system with partial pressure 20 mm Hg?
a) 5 mm Hg
b) 10 mm Hg
c) 20 mm Hg
d) 50 mm Hg
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6. According to Henry’s Law, what is the fraction of a gas with partial pressure p and Henry’s constant H?
a) p*H
b) p/H
c) p + H
d) p – H
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7. What is the partial pressure of a 10% gas in a system, if H = 2 mm Hg?
a) 0.1 mm Hg
b) 0.2 mm Hg
c) 0.3 mm Hg
d) 0.4 mm Hg
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8. What is the fraction of a gas in a system with partial pressure 10 mm Hg, H = 25 mm Hg?
a) 0.1
b) 0.2
c) 0.3
d) 0.4
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9. A 40% gas in a system has partial pressure 4 atm, what is Henry’s constant?
a) 1.6 atm
b) 4 atm
c) 10 atm
d) 16 atm
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10. What is the partial pressure of a 70% gas in a system, if H = 5 mm Hg?
a) 3.5 mm Hg
b) 7 mm Hg
c) 14 mm Hg
d) 35 mm Hg
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11. What is the K value of a gas with partial pressure 10 atm and total pressure of the system is 50 atm?
a) 0.1
b) 0.2
c) 100
d) 500
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12. What is the K value of a gas with partial pressure 50 Pa and total pressure of the system is 1 mm Hg?
a) 0.37
b) 0.45
c) 0.79
d) 0.91
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13. What is the total pressure of a system having 40% O₂ with 5 atm partial pressure and 60% N₂ with 10 atm partial pressure?
a) 2 atm
b) 6 atm
c) 8 atm
d) 10 atm
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14. What is the total pressure of a system having 25% CO₂ with 4 atm partial pressure and 30% O₂ with 10 atm partial pressure, and 45% SO₂ with partial pressure 20 atm?
a) 9 atm
b) 13 atm
c) 17 atm
d) 19 atm
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15. What is the total pressure of a system having 50% H₂CO₃ with 6 atm partial pressure and 50% O₂ with 12 atm partial pressure?
a) 3 atm
b) 6 atm
c) 9 atm
d) 12 atm
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