E-PolyLearning

26. A gas mixture comprises of 20% CO₂, 50% O₂, and 30% N₂ has the total pressure 100 Pa at temperature -73°C, if the temperature is increased to 27°C, what is the new partial pressure of N₂?
a. 15 Pa
b. 30 Pa
c. 45 Pa
d. 60 Pa
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Answer: (c).45 Pa

27. A container has gas mixture of 20% H₂ and 80% N₂ with total pressure P, now same amount of O₂ is added to the mixture, what is the new partial pressure of N₂?
a. 0.2P
b. 0.8P
c. P
d. 1.6P
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Answer: (b).0.8P

28. A container has gas mixture of 40% CO₂ and 60% H₂ with total pressure 10 Pa, if now O₂ is added to it isothermally so that the final composition of the mixture becomes 20% CO₂, 30% H₂, and 50% O₂, what is the partial pressure of O₂ in the new composition?
a. 5 Pa
b. 10 Pa
c. 20 Pa
d. 35 Pa
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Answer: (b).10 Pa

29. A gas mixture has 30% O₂, 40% H₂, and 30% N₂ with molar volume of N₂ 10 L/mole at temperature 27°C, what is the partial pressure of H₂?
a. 2.4 atm
b. 3.6 atm
c. 4.8 atm
d. 6.4 atm
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Answer: (a).2.4 atm

30. A gas mixture contains 20% CO, 30% SO₂, and 50% N₂, if the partial pressure of N₂ is 5 atm at 27°C, what is the molar volume of N₂?
a. 2.4 liter
b. 3.7 liter
c. 4.9 liter
d. 5.6 liter
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Answer: (a).2.4 liter

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