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51.	Which of the following is equal to the product of humidity and mass of dry gas?(a) Moles of water vapor(b) Mass of water vapor(c) Mass of gas vapor(d) None of the mentionedThe question was posed to me by my school principal while I was bunking the class.The doubt is from Partial Saturation Terminology in section Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering
Answer» The correct answer is (b) MASS of water VAPOR To explain I WOULD say: Humidity = (mass of water vapor)/(mass of dry GAS).

52.	What is the molal saturation of a gas with 10 Pa partial pressure without vapor and 0.5 atm partial pressure with vapor?(a) 0.5(b) 1(c) 5(d) 101.3This question was addressed to me during an online exam.I'd like to ask this question from Partial Saturation Terminology topic in chapter Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering
Answer» Correct CHOICE is (C) 5 The explanation: MOLAL saturation = 0.5*101.3/10 = 5.

53.	What is the molal saturation of a gas with 10 moles of gas vapor and 25 moles of dry gas?(a) 0.2(b) 0.4(c) 0.8(d) 1The question was posed to me in quiz.I want to ask this question from Partial Saturation Terminology topic in division Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering
Answer» The CORRECT OPTION is (B) 0.4 Explanation: MOLAL SATURATION = 10/25 = 0.4.

54.	What is the molal humidity of a gas with pressure of gas vapor 10 mm Hg and pressure of vapor free gas 20 mm Hg?(a) 25%(b) 50%(c) 100%(d) 200%I have been asked this question in quiz.This interesting question is from Partial Saturation Terminology topic in division Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering
Answer» The correct choice is (B) 50% Explanation: Molal HUMIDITY = 10/20*100 = 50%.

55.	What is called the ratio of partial pressure of vapor and partial pressure of the dry gas?(a) Humidity(b) Relative humidity(c) Molal humidity(d) None of the mentionedThis question was addressed to me in a job interview.Enquiry is from Partial Saturation Terminology topic in division Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering
Answer» The correct OPTION is (C) Molal humidity The explanation is: Partial PRESSURE of vapor DIVIDED by the partial pressure of vapor free gas is called molal humidity.

56.	What is the relative humidity of a gas with a partial pressure of water vapor 360 Pa and vapor pressure 1 atm?(a) 100%(b) 225.1%(c) 355.4%(d) 405.9%This question was addressed to me by my college director while I was bunking the class.I would like to ask this question from Partial Saturation Terminology in chapter Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering
Answer» RIGHT OPTION is (c) 355.4% For explanation I WOULD SAY: Relative humidity = 360/101.3*100 = 355.4%.

57.	What is the relative saturation of a gas with partial pressure 38 mm Hg and vapor pressure 1 torr?(a) 0.05(b) 0.5(c) 2(d) 38The question was asked in exam.My question is based upon Partial Saturation Terminology in portion Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering
Answer» CORRECT OPTION is (d) 38 The BEST I can explain: 1 TORR = 1 MM Hg, => relative saturation = 38/1 = 38.

58.	What is the relative humidity of a gas with a partial pressure of water vapor is 5 mm Hg and vapor pressure 8 mm Hg?(a) 25%(b) 32.5%(c) 45%(d) 62.5%This question was addressed to me during an interview.This intriguing question originated from Partial Saturation Terminology in chapter Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering
Answer» RIGHT option is (d) 62.5% To explain I would say: RELATIVE humidity = 5/8*100 = 62.5%.

59.	What is the relative saturation of a gas with partial pressure 10 mm Hg and vapor pressure 5 mm Hg?(a) 0.5(b) 1(c) 2(d) 4I had been asked this question by my college director while I was bunking the class.My doubt is from Partial Saturation Terminology in division Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering
Answer» The correct answer is (c) 2 To EXPLAIN I would say: RELATIVE saturation = 10/5 = 2.

60.	Which of the following is defined as the ratio of partial pressure and vapor pressure?(a) Relative Humidity(b) Molal Humidity(c) Humidity(d) None of the mentionedI have been asked this question at a job interview.The doubt is from Partial Saturation Terminology in chapter Two Phase Gas – Liquid Systems, Phase Rule and Vapor-Liquid Equilibria of Basic Chemical Engineering
Answer» CORRECT answer is (a) Relative Humidity For EXPLANATION I WOULD say: Partial PRESSURE DIVIDED by vapor pressure is called relative humidity.