InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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 mentionedI had been asked this question by my school principal while I was bunking the class.My question is taken from Two component Gas -Two component Liquid system-II in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Correct ANSWER is (a) PARTIAL PRESSURE in the gas PHASE of the dilute component |
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| 2. |
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 mentionedI got this question in my homework.I want to ask this question from Two component Gas -Two component Liquid system-II topic in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Correct CHOICE is (b) Dalton`s Law |
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| 3. |
Vapour pressure is dependent on(a) Temperature(b) Pressure(c) Volume(d) None of the mentionedThis question was addressed to me by my school principal while I was bunking the class.I'd like to ask this question from Two component Gas -Two component Liquid system-II in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» CORRECT choice is (a) Temperature Explanation: Vapour PRESSURE is DEPENDENT on Temperature. |
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| 4. |
Positive deviation showing from Raoult’s law is?(a) Water – hydrochloric acid(b) Acetone – chloroform(c) Water – nitric acid(d) Benzene – methanolThe question was asked in a national level competition.The question is from Two component Gas -Two component Liquid system-II topic in chapter Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Correct answer is (b) ACETONE – chloroform |
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| 5. |
Henry`s law is used primarily for a component whose mole fraction approaches_______(a) 0(b) 0.25(c) 0.50(d) 1.00I have been asked this question in an interview for job.Question is taken from Two component Gas -Two component Liquid system-II in section Multiphase Equilibrium of Chemical Process Calculation |
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Answer» RIGHT option is (a) 0 To elaborate: Henry`s law is USED primarily for a component whose MOLE fraction APPROACHES to ZERO. |
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| 6. |
What Pi represents in the expression?(a) Partial pressure of component i in the vapor phase(b) Mole fraction of component i in the liquid phase(c) Vapor pressure of component i at T(d) None of the mentionedThis question was addressed to me in an online interview.Asked question is from Two component Gas -Two component Liquid system-I topic in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» RIGHT choice is (c) Vapor pressure of COMPONENT i at T Explanation: PI represents the Vapor pressure of component i at T. |
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| 7. |
In an ideal solution(a) All of the molecules have same intra-molecular force(b) All of the molecules may have same intra-molecular force(c) All of the molecules do not have same intra-molecular force(d) None of the mentionedI got this question in an internship interview.My doubt is from Two component Gas -Two component Liquid system-I topic in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» The CORRECT option is (a) All of the MOLECULES have same intra-molecular force |
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| 8. |
In vapor-liquid equilibrium, the component with lesser vapor pressure tends to accumulate in ______ phase.(a) Vapor(b) Liquid(c) Solid(d) None of the mentionedI had been asked this question in final exam.The question is from Two component Gas -Two component Liquid system-I in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right CHOICE is (B) Liquid |
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| 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 LAwThe question was posed to me in homework.Asked question is from Two component Gas -Two component Liquid system-II topic in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» The correct answer is (d) Raoult`s LAw |
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| 10. |
Vapour pressure measures the concentration of solvent molecules in the ________ phase.(a) Gas(b) Liquid(c) Solid(d) None of the mentionedThe question was posed to me during an interview.My doubt stems from Two component Gas -Two component Liquid system-II topic in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right choice is (a) GAS |
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| 11. |
For a solution to be ideal(a) All the molecules of all type should have the same size(b) All the molecules of all type may have the same size(c) All the molecules of all type must not have the same size(d) None of the mentionedThe question was asked by my school principal while I was bunking the class.My enquiry is from Two component Gas -Two component Liquid system-I topic in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right choice is (a) All the molecules of all TYPE should have the same SIZE |
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| 12. |
The escaping tendency of a solvent is measured by its(a) Vapour pressure(b) Partial pressure(c) Ambient pressure(d) None of the mentionedThis question was posed to me in a national level competition.This question is from Two component Gas -Two component Liquid system-II topic in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» The CORRECT choice is (a) Vapour PRESSURE |
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| 13. |
What Xi represents in the expression?(a) Partial pressure of component i in the vapor phase(b) Mole fraction of component i in the liquid phase(c) Vapor pressure of component i at T(d) None of the mentionedThis question was posed to me by my school principal while I was bunking the class.This is a very interesting question from Two component Gas -Two component Liquid system-I in chapter Multiphase Equilibrium of Chemical Process Calculation |
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Answer» The correct CHOICE is (b) MOLE fraction of component i in the LIQUID phase |
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| 14. |
In vapor-liquid equilibrium, the component with larger vapor pressure tends to accumulate in ______ phase.(a) Vapor(b) Liquid(c) Solid(d) None of the mentionedThis question was posed to me in an internship interview.The origin of the question is Two component Gas -Two component Liquid system-I in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Correct ANSWER is (a) VAPOR |
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| 15. |
Condensation starts ________ point.(a) Dew point(b) Bubble point(c) Triple point(d) None of the mentionedI had been asked this question by my school teacher while I was bunking the class.I need to ask this question from Condensation topic in chapter Multiphase Equilibrium of Chemical Process Calculation |
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Answer» The CORRECT answer is (a) DEW point |
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| 16. |
________ is the change of vapour in a non-condensable gas.(a) Saturation(b) Vaporization(c) Condensation(d) None of the mentionedThis question was addressed to me in an online interview.The origin of the question is Condensation topic in chapter Multiphase Equilibrium of Chemical Process Calculation |
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Answer» RIGHT option is (C) Condensation For explanation: Condensation is the change of vapour in a non-condensable GAS. |
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| 17. |
Dew point of water at standard conditions is?(a) 100 K(b) 273 K(c) 373 K(d) 473 KI had been asked this question in an internship interview.My doubt stems from Saturation in chapter Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right answer is (c) 373 K |
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| 18. |
The pressure along the melting curve is(a) Sublimation pressure(b) Saturation pressure(c) Condensation pressure(d) None of the mentionedThe question was asked during an interview.My question is from Phase diagrams and Phase Rule-II in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» The correct CHOICE is (a) Sublimation PRESSURE |
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| 19. |
If the vapour and liquid of a pure component are in equilibrium, the equilibrium pressure is called(a) Partial pressure(b) Vapour pressure(c) Liquid pressure(d) None of the mentionedThe question was asked in examination.This is a very interesting question from Phase diagrams and Phase Rule-I topic in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» The correct CHOICE is (b) VAPOUR pressure |
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| 20. |
In vapor-liquid equilibrium, the less volatile component tends to accumulate in ______ phase.(a) Vapor(b) Liquid(c) Solid(d) None of the mentionedI have been asked this question in a job interview.I'd like to ask this question from Two component Gas -Two component Liquid system-I in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Correct ANSWER is (b) LIQUID |
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| 21. |
Properties that do not depend on the quantity of material present, are called(a) Intensive properties(b) Extensive properties(c) Variable properties(d) None of the mentionedI had been asked this question in exam.Enquiry is from Phase diagrams and Phase Rule-III in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» RIGHT answer is (a) Intensive PROPERTIES Easiest EXPLANATION: Properties that do not depend on the quantity of material PRESENT are CALLED intensive properties. |
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| 22. |
The change of phase from liquid to vapour is(a) Condensation(b) Evaporation(c) Sublimation(d) None of the mentionedThis question was posed to me during an internship interview.This question is from Phase diagrams and Phase Rule-II topic in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right ANSWER is (B) Evaporation |
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| 23. |
In vapor-liquid equilibrium, the more volatile component tends to accumulate in ______ phase.(a) Vapor(b) Liquid(c) Solid(d) None of the mentionedI got this question in a job interview.The above asked question is from Two component Gas -Two component Liquid system-I topic in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» The correct OPTION is (a) VAPOR |
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| 24. |
When vapour is cooled at constant total system volume, the _______ changes.(a) Volume(b) Pressure(c) Temperature(d) None of the mentionedThe question was posed to me in a job interview.This intriguing question comes from Condensation topic in chapter Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right OPTION is (b) Pressure |
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| 25. |
The change of phase from liquid to solid is(a) Freezing(b) Evaporation(c) Sublimation(d) None of the mentionedThis question was posed to me in examination.My doubt is from Phase diagrams and Phase Rule-II in chapter Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right answer is (a) Freezing |
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| 26. |
When the air temperature rises, the saturation vapor pressure(a) Increases(b) Decreases(c) Remains same(d) None of the mentionedThis question was addressed to me in semester exam.My question is taken from Vaporization topic in chapter Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right CHOICE is (a) Increases |
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| 27. |
When gas changes to liquid through the process of condensation, the temperature(a) Increases(b) Decreases(c) Remains constant(d) None of the mentionedThis question was posed to me in homework.I want to ask this question from Condensation topic in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» The correct ANSWER is (C) REMAINS constant |
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| 28. |
In a condensation process, _______ to _________(a) Gas, Solid(b) Gas, Liquid(c) Liquid, Gas(d) Liquid, SolidThe question was posed to me at a job interview.Question is taken from Condensation in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» RIGHT choice is (b) Gas, LIQUID The BEST explanation: In a CONDENSATION PROCESS, Gas to Liquid. |
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| 29. |
The temperature at which the vapour just start to condense at a specified pressure is(a) Critical temperature(b) Boiling point(c) Dew point(d) Triple pointThis question was posed to me in an interview for job.My query is from Saturation topic in section Multiphase Equilibrium of Chemical Process Calculation |
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Answer» CORRECT option is (c) Dew point The explanation is: The temperature at which the VAPOUR just START to condense at a SPECIFIED PRESSURE is Dew point. |
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| 30. |
Phase rule is concerned only with the __________ properties of the system.(a) Intensive(b) Extensive(c) Both intensive and extensive(d) Neither intensive nor extensiveThe question was asked by my college professor while I was bunking the class.My query is from Phase diagrams and Phase Rule-III in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right answer is (a) Intensive |
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| 31. |
The fraction of water vapor at 300 K and 8 atm is 0.8. Calculate the fraction of water vapor at the same temperature and 1 atm pressure?(a) 0.1(b) 0.2(c) 0.3(d) 0.4The question was posed to me during an internship interview.This interesting question is from Vaporization topic in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Correct option is (a) 0.1 |
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| 32. |
When the vapour is condensed at constant system pressure, the pressure changes.(a) Correct statement(b) Incorrect statement(c) Can`t say anything(d) None of the mentionedThe question was asked in an online quiz.The doubt is from Condensation topic in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right option is (a) CORRECT statement |
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| 33. |
Change in phase from solid to vapour(a) Melting(b) Boiling(c) Evaporation(d) SublimationI got this question in a job interview.Question is from Phase diagrams and Phase Rule-II topic in chapter Multiphase Equilibrium of Chemical Process Calculation |
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Answer» RIGHT answer is (d) SUBLIMATION Easy explanation: Change in phase from SOLID to VAPOUR is Sublimation. |
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| 34. |
Heating a liquid at constant pressure can definitely cause____________(a) Vaporization(b) Condensation(c) Boiling(d) None of the mentionedThe question was asked in unit test.I need to ask this question from Vaporization in section Multiphase Equilibrium of Chemical Process Calculation |
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Answer» CORRECT option is (a) Vaporization Easiest explanation: Heating a LIQUID at CONSTANT pressure can DEFINITELY cause Vaporization. |
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| 35. |
Most heat energy is required in the following process?(a) Sublimation(b) Evaporation(c) Condensation(d) None of the mentionedI had been asked this question in semester exam.This interesting question is from Vaporization topic in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right OPTION is (a) Sublimation |
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| 36. |
The temperature at which a liquid will begin to boil at the standard atmospheric pressure is(a) Normal boiling point(b) Normal melting point(c) Normal freezing point(d) None of the mentionedThis question was posed to me during an interview for a job.This is a very interesting question from Phase diagrams and Phase Rule-II in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right CHOICE is (a) NORMAL BOILING point |
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| 37. |
What is the composition of vapour?(a) 0.163(b) 0.183(c) 0.2837(d) 0.8367This question was addressed to me in a job interview.I'm obligated to ask this question of Saturation in chapter Multiphase Equilibrium of Chemical Process Calculation |
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Answer» CORRECT OPTION is (a) 0.163 Explanation: YH2O = 98/600. |
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| 38. |
_________ variable does depend on how much material you have.(a) Intensive(b) Extensive(c) Both intensive and extensive(d) Neither intensive nor extensiveI got this question during an online interview.The question is from Phase diagrams and Phase Rule-III in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right choice is (b) EXTENSIVE |
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| 39. |
Amount of water vapor in the air increases as the dew point temperature ______________(a) Increases(b) Decreases(c) Remains same(d) None of the mentionedThe question was asked in examination.The above asked question is from Vaporization topic in division Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right OPTION is (a) Increases |
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| 40. |
The one P-T-V combination at which solid, liquid and vapour are in equilibrium, is called(a) Critical point(b) Triple point(c) Saturation point(d) None of the mentionedI have been asked this question at a job interview.This interesting question is from Phase diagrams and Phase Rule-I topic in section Multiphase Equilibrium of Chemical Process Calculation |
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| 41. |
__________ is the temperature at which a liquid just start to vaporize.(a) Critical point(b) Bubble point(c) Triple point(d) Saturation pointThe question was asked by my school principal while I was bunking the class.I want to ask this question from Phase diagrams and Phase Rule-I topic in chapter Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Correct choice is (B) BUBBLE point |
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| 42. |
When the air temperature rises the saturation mixing ratio(a) Increases(b) Decreases(c) Remains same(d) None of the mentionedI got this question in examination.My doubt is from Vaporization topic in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» The correct choice is (a) INCREASES |
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| 43. |
In a vaporization process __________ changes to _________(a) Vapor, liquid(b) Vapor, solid(c) Solid, Vapor(d) Liquid, VaporThis question was posed to me in an online interview.My question comes from Vaporization in chapter Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Correct OPTION is (d) Liquid, VAPOR |
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| 44. |
A ________ system is one in which no variation of conditions is possible without one phase disappearing.(a) Variant(b) Invariant(c) Constant(d) None of the mentionedI had been asked this question by my college professor while I was bunking the class.The origin of the question is Phase diagrams and Phase Rule-III topic in section Multiphase Equilibrium of Chemical Process Calculation |
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Answer» CORRECT answer is (b) Invariant Easiest explanation: A invariant SYSTEM is one in which no variation of conditions is possible WITHOUT one PHASE DISAPPEARING. |
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| 45. |
At a given temperature there is only ________ pressure at which the vapour and liquid phases of a pure substances may exist in equilibrium.(a) Three(b) Two(c) One(d) None of the mentionedThe question was posed to me in examination.The origin of the question is Phase diagrams and Phase Rule-I in section Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Right option is (c) One |
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| 46. |
Incorrect statement about a phase diagram is(a) Phase diagram are based on equilibrium conditions(b) For phase equilibrium, it is assumed that the phase doesn`t remain invariant(c) Phase diagrams enable to view the properties of two or more phases as a function of temperature, pressure and other variable(d) None of the mentionedThis question was posed to me in an online interview.Question is from Phase diagrams and Phase Rule-I topic in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» CORRECT OPTION is (b) For phase equilibrium, it is assumed that the phase doesn`t remain invariant Best EXPLANATION: For phase equilibrium, it is assumed that the phase remains invariant. |
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| 47. |
Vaporization starts at __________ point.(a) Dew point(b) Bubble point(c) Triple point(d) None of the mentionedThis question was posed to me during an interview.My question is based upon Vaporization in section Multiphase Equilibrium of Chemical Process Calculation |
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Answer» CORRECT option is (B) Bubble point The best EXPLANATION: At Bubble point LIQUID starts EVAPORATING which is the point at which vaporization starts. |
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| 48. |
If the fraction of water vapour at 127 Degree Celsius and 1 atm is 0.5, what is the fraction of water vapour at 27 Degree C and 1 atm?(a) 0.275(b) 0.375(c) 0.475(d) 0.875This question was addressed to me during a job interview.My question comes from Condensation topic in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» RIGHT OPTION is (B) 0.375 Best EXPLANATION: FRACTION = 0.5*300/400 = 0.375. |
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| 49. |
The temperature at which the solid melts at 1 atm is called(a) Normal boiling point(b) Normal melting point(c) Normal freezing point(d) None of the mentionedI got this question during an internship interview.This key question is from Phase diagrams and Phase Rule-II in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» CORRECT OPTION is (b) NORMAL melting point The best EXPLANATION: The temperature at which the solid melts at 1 atm is CALLED Normal melting point. |
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| 50. |
A non-condensable gas is found(a) Above the critical point(b) Below the critical point(c) On the critical point(d) None of the mentionedThis question was posed to me in exam.My query is from Phase diagrams and Phase Rule-I topic in portion Multiphase Equilibrium of Chemical Process Calculation |
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Answer» Correct choice is (a) Above the critical POINT |
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