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Chemical engineering thermodynamics
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ Ideal refrigeration cycle is same as reverse Carnot cycle. [other wrong options] [Discuss in forum] same as Carnot cycle. dependent on the refrigerant's properties. the least efficient of all refrigeration processes. |
Q22 ⇒ The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure is called __________ temperature. Boyle [other wrong options] [Discuss in forum] inversion critical reduced |
Q23 ⇒ Critical compressibility factor for all substances are more or less constant (vary from 0.2 to 0.3). [other wrong options] [Discuss in forum] vary as square of the absolute temperature. vary as square of the absolute pressure. none of these. |
Q24 ⇒ Internal energy is equal to the heat absorbed in case of a/an __________ process. constant volume [other wrong options] [Discuss in forum] polytropic adiabatic constant pressure |
Q25 ⇒ The Carnot co-efficient of performance (COP) of a domestic air conditioner compared to a household refrigerator is less [other wrong options] [Discuss in forum] more same dependent on climatic conditions |
Q26 ⇒ Which of the following is not a unit of the equilibrium constant Kp? (where, Δx = number of moles of products number of moles of reactants) (atm)Δx2, when Δx > 0 [other wrong options] [Discuss in forum] (atm)Δx, when Δx is negative (atm)Δx, when Δx is positive Dimensionless, when Δx = 0 |
Q27 ⇒ Consider the process A & B shown in the figure given be process A is isothermal while B is adiabatic. [other wrong options] [Discuss in forum] both the processes are adiabatic. both the processes are isothermal. process A is adiabatic while B is isothermal. |
Q28 ⇒ What is the number of degree of freedom for a system of two miscible non-reacting species in vapor-liquid equilibrium forming an azeotrope ? 1 [other wrong options] [Discuss in forum] 3 2 0 |
Q29 ⇒ Number of phases in a colloidal system are 2 [other wrong options] [Discuss in forum] 1 3 4 |
Q30 ⇒ Which of the following liquid metals has the highest thermal conductivity ? Molten sodium [other wrong options] [Discuss in forum] Molten lead Mercury Molten potassium |
Q31 ⇒ Which law of the thermodynamics provids basis for measuring the thermodynamic property ? Zeroth law [other wrong options] [Discuss in forum] First law Third law Second law |
Q32 ⇒ For an ideal gas, the activity co-efficient is unity at all pressures. [other wrong options] [Discuss in forum] directly proportional to pressure. inversely proportional to pressure. none of these. |
Q33 ⇒ The gas law (PV = RT) is true for an __________ change. both (a) & (b) [other wrong options] [Discuss in forum] isothermal adiabatic neither (a) nor (b) |
Q34 ⇒ "If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them". This is __________ law. Hess's [other wrong options] [Discuss in forum] Kirchoff's Lavoisier and Laplace none of these |
Q35 ⇒ With increase in compression ratio, the efficiency of the otto engine increases [other wrong options] [Discuss in forum] decreases remains constant increases linearly |
Q36 ⇒ Adiabatic compression of a saturated water vapour makes it superheated [other wrong options] [Discuss in forum] supersaturated both (a) and (b) neither (a) nor (b) |
Q37 ⇒ For an exothremic reaction both ΔH and ΔE are negative. [other wrong options] [Discuss in forum] only enthalpy change (ΔH) is negative. only internal energy change (ΔE) is negative. enthalpy change is zero. |
Q38 ⇒ __________ equation predicts the activity co-efficient from experimental data. both(b)&(c) [other wrong options] [Discuss in forum] Lewis-Randall Margules Van Laar |
Q39 ⇒ "When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change." This is called the Le-Chatelier principle. [other wrong options] [Discuss in forum] Kopp's rule. law of corresponding state. Arrehenius hypothesis. |
Q40 ⇒ High __________ is an undesirable property for a good refrigerant. viscosity [other wrong options] [Discuss in forum] specific heat latent heat of vaporisation specific vapor volume |
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