InterviewSolution

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51.	Vaporization temperature of water at standard conditions is _______________ Degree Celsius.(a) 100(b) 200(c) 300(d) 400This question was addressed to me in an interview.The doubt is from Vaporization topic in portion Multiphase Equilibrium of Chemical Process Calculation
Answer» Correct OPTION is (a) 100 The EXPLANATION is: Vaporization TEMPERATURE of water at STANDARD conditions is 100 Degree Celsius.

52.	When vapour is compressed isothermally the ____________ changes.(a) Volume(b) Pressure(c) Temperature(d) None of the mentionedI have been asked this question by my college professor while I was bunking the class.My doubt stems from Condensation topic in portion Multiphase Equilibrium of Chemical Process Calculation
Answer» The CORRECT option is (a) Volume For explanation: When vapour is COMPRESSED isothermally the volume CHANGES.

53.	Saturated liquid or saturated vapour can be found(a) Along the liquid and vapour equilibrium curve(b) Along the liquid and solid equilibrium curve(c) Along the solid and vapour equilibrium curve(d) None of the mentionedI had been asked this question by my college director while I was bunking the class.Asked question is from Phase diagrams and Phase Rule-II topic in portion Multiphase Equilibrium of Chemical Process Calculation
Answer» RIGHT ANSWER is (a) Along the liquid and vapour EQUILIBRIUM curve Easiest EXPLANATION: Saturated liquid or saturated vapour can be FOUND along the liquid and vapour equilibrium curve.

54.	Antoine equation is a relation between(a) Vapour pressure and partial pressure(b) Vapour pressure and Temperature(c) Vapour pressure and absolute pressure(d) None of the mentionedI have been asked this question in an interview for job.My doubt is from Saturation topic in portion Multiphase Equilibrium of Chemical Process Calculation
Answer» The correct CHOICE is (b) VAPOUR PRESSURE and Temperature To EXPLAIN: Antoine equation is a RELATION between Vapour pressure and Temperature.

55.	Gibbs phase rule can be applied to the systems which are in(a) Saturation(b) Equilibrium(c) Critical state(d) Supercritical stateThe question was posed to me in an online quiz.This intriguing question originated from Phase diagrams and Phase Rule-III in section Multiphase Equilibrium of Chemical Process Calculation
Answer» The correct answer is (b) EQUILIBRIUM The BEST EXPLANATION: GIBBS phase rule can be applied to the SYSTEMS which are in equilibrium.

56.	Find the incorrect statement for condensation(a) The change of phase from vapour to liquid(b) Occurs at constant temperature and pressure(c) The process appears as a point in in a P-T diagram(d) All of the mentionedI got this question in unit test.I need to ask this question from Phase diagrams and Phase Rule-I in division Multiphase Equilibrium of Chemical Process Calculation
Answer» CORRECT OPTION is (d) All of the mentioned Easy explanation: All a, b & c are correct for CONDENSATION.

57.	The change of phase from liquid to vapour is called(a) Boiling(b) Melting(c) Condensation(d) None of the mentionedThis question was posed to me in homework.My question is based upon Phase diagrams and Phase Rule-I in portion Multiphase Equilibrium of Chemical Process Calculation
Answer» The CORRECT OPTION is (a) BOILING The best explanation: The change of phase from liquid to vapour is CALLED Boiling.

58.	What is the degree of freedom for pure liquid Benzene?(a) 1(b) 2(c) 3(d) 4I got this question in semester exam.I'd like to ask this question from Phase diagrams and Phase Rule-III in chapter Multiphase Equilibrium of Chemical Process Calculation
Answer» The correct choice is (b) 2 Explanation: F = 2 – 1 + 1 = 2.

59.	What is the degree of freedom for a mixture of ice and vapour?(a) 1(b) 2(c) 3(d) 4I have been asked this question during an interview.My question is taken from Phase diagrams and Phase Rule-III in section Multiphase Equilibrium of Chemical Process Calculation
Answer» RIGHT option is (a) 1 Easy EXPLANATION: F = 2 – 2 + 1 = 1.

60.	Boiling occurs at ________ temperature and _______ pressure, the process appears as a point in ____ diagram.(a) Constant, constant, P-T(b) Variable, constant, P-T(c) Constant, variable, V-T(d) Variable, variable, V-TThe question was posed to me in exam.The doubt is from Phase diagrams and Phase Rule-II topic in chapter Multiphase Equilibrium of Chemical Process Calculation
Answer» Right OPTION is (a) Constant, constant, P-T The explanation is: Boiling OCCURS at constant TEMPERATURE and constant pressure, the process appears as a point in P-T diagram.

61.	Representation of the different phase of a compound on a two or three dimensional graph is(a) Block diagram(b) Equilibrium diagram(c) Phase diagram(d) None of the mentionedThe question was posed to me during an interview.My question is taken from Phase diagrams and Phase Rule-I topic in division Multiphase Equilibrium of Chemical Process Calculation
Answer» Right CHOICE is (c) Phase DIAGRAM To elaborate: REPRESENTATION of the different phase of a compound on a two or three DIMENSIONAL GRAPH is called Phase diagram.