This set of Chemical Engineering online test focuses on “Liquids and Gases in Equilibrium with Solids”.
1. What is the fraction of a gas in a system at partial pressure 1 mm Hg, if the 0.2 fraction of the same gas is at partial pressure 2 mm Hg and 0.3 fraction at partial pressure 3 mm Hg (Use Freundlich Isotherm)?
a) 0.1
b) 0.2
c) 0.3
d) 0.4
View answer
Explanation: y1/y2 = (p1/p2)n, => 0.2/0.3 = (2/3)n => n = 1, => 0.2 = k*21 = k = 0.1, => y = 0.1*11 = 0.1.
2. What is the fraction of a gas in a system at partial pressure 2 mm Hg, if the 0.2 fraction of the same gas is at partial pressure 8 mm Hg and 0.3 fraction at partial pressure 18 mm Hg (Use Freundlich Isotherm)?
a) 0.0125
b) 0.0250
c) 0.0375
d) 0.0450
View answer
Explanation: y1/y2 = (p1/p2)n, => 0.2/0.3 = (8/18)n => n = 2, => 0.2 = k*82 = k = 0.2/64, => y = 0.2/64*22 = 0.0125.
3. What is the fraction of a gas in a system at partial pressure 1 atm, if the 0.1 fraction of the same gas is at partial pressure 2 atm and 0.2 fraction at partial pressure 4 atm (Use Freundlich Isotherm)?
a) 0.01
b) 0.03
c) 0.05
d) 0.08
View answer
Explanation: y1/y2 = (p1/p2)n, => 0.1/0.2 = (2/4)n => n = 1, => 0.1 = k*21 = k = 0.1/2, => y = 0.1/2 = 0.05.
4. What is the fraction of a gas in a system at partial pressure 1 atm, if the 0.2 fraction of the same gas is at partial pressure 4 atm and 0.4 fraction at partial pressure 8 atm (Use Freundlich Isotherm)?
a) 0.1
b) 0.2
c) 0.4
d) 0.5
View answer
Explanation: y1/y2 = (p1/p2)n, => 0.2/0.4 = (4/8)n => n = 1, => 0.2 = k*41 = k = 0.2/4, => y = 0.2/4*1 = 0.05.
5. What is the fraction of a gas in a system at partial pressure 3 atm, if the 0.2 fraction of the same gas is at partial pressure 4 atm and 0.3 fraction at partial pressure 6 atm (Use Freundlich Isotherm)?
a) 0.1
b) 0.15
c) 0.2
d) 0.25
View answer
Explanation: y1/y2 = (p1/p2)n, => 0.2/0.3 = (4/6)n => n = 1, => 0.2 = k*41 = k = 0.2/4, => y = 0.2/4*31 = 0.15.
6. Which of the following is called for the adsorbing the molecules?
a) Adsorbate
b) Adsorbent
c) Absobate
d) None of the mentioned
View answer
Explanation: The one which adsorbs the molecules is called the adsorbent.
7. Which of the following adsorbs on the adsorbing surface?
a) Adsorbate
b) Adsorbent
c) Absobate
d) None of the mentioned
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Explanation: Adsorbate adsorbs on the adsorbent.
8. Which of the following is called for the curves following isothermal adsorbtion?
a) Adsorbtion isotherm
b) Adsorbate isotherm
c) Adsorbent isotherm
d) Absorbent isotherm
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Explanation: The curves for isothermal adsorbtion are called adsorbtion isotherms.
9. Which of the following is the property of adsorbtion isotherm?
a) Linear
b) Decreasing
c) Monotonous
d) None of the mentioned
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Explanation: Since the adsorbtion isotherms are always increasing they are monotonous.
10. Which of the following satisfies the first derivative of adsorbtion isotherms?
a) Greater than 1
b) Less than 1
c) Equal to 1
d) Cannot say
View answer
Explanation: Since adsorbtion isotherms are always increasing, so their first derivative are always increasing.
Sanfoundry Global Education & Learning Series – Basic Chemical Engineering.
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