chemical engineering MCQs – Page 415

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

8281. Which of the following liquid metals has the highest thermal conductivity ?
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A. Molten sodium

B. Mercury

C. Molten potassium

D. Molten lead

8282. Raoults law is not applicable to the___________________?
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A. Solutes which dissociate or associate in the particular solution

B. Concentrated solutions

C. Both B. & C.

D. Solutions containing non-volatile solute

8283. The main feature of Carnot refrigeration cycle is that, it________________________?
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A. None of these

B. Accomplishes the reverse effect of the heat engine

C. Does not need the addition of external work for its functioning

D. Transfers heat from high temperature to low temperature

8284. The number of degrees of freedom for an azeotropic mixture in a two component vapourliquid equilibria is/are__________________?
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A. Zero

B. Three

C. Two

D. One

8285. In any spontaneous process, the ______________ free energy decreases ?
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A. Helmholtz

B. Gibbs

C. Both A. & B.

D. Neither A. nor B.

8286. Specific _____________ does not change during phase change at constant temperature and pressure?
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A. Entropy

B. Enthalpy

C. Gibbs energy

D. Internal energy

8287. The temperature at which a real gas obeys Boyles law is termed as the__________________?
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A. Eutectic point

B. Inversion temperature

C. Triple point

D. Boyles temperature

8288. Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and temperature ____________ as its mole fraction increases?
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A. Remain constant

B. Decreases

C. Increases

D. Decreases exponentially

8289. Degree of freedom of a system consisting of a gaseous mixture of H2 and NH3 will be_________________?
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A. 2

B. 1

C. 3

D. 0

8290. Internal energy is equal to the heat absorbed in case of a/an ______________ process?
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A. Constant volume

B. Polytropic

C. Adiabatic

D. Constant pressure

8291. The number of degrees of freedom at the triple point of water is__________________?
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A. 2

B. 3

C. 0

D. 1

8292. 1m3 is approximately equal to_________________?
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A. 28 litres

B. 4.5 litres

C. 35 ft3

D. 4.5 ft3

8293. For an irreversible process involving only pressure-volume work____________________?
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A. (dF)T, p = 0

B. (dF)T, p > 0

C. (dA)T, v >0

D. (dF)T, p

8294. Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be___________________?
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A. One fourth of its original value

B. Doubled

C. Halved

D. Same

8295. At a constant volume, for a fixed number of moles of a gas, the pressure of the gas increases with rise of temperature due to___________________?
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A. Increased collision rate among molecules

B. Decrease in mean free path

C. Increase in molecular attraction

D. Increase in average molecular speed

8296. The compressibility factor of a gas is given by (where, V1 = actual volume of the gas V2 = gas volume predicted by ideal gas law)____________________?
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A. V1/V2

B. V2/V1

C. V1 V2

D. V1.V2

8297. Which of the following behaves most closely like an ideal gas ?
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A. H2

B. O2

C. He

D. N2

8298. Translational kinetic energy of molecules of an ideal gas is proportional to (where, T = absolute temperature of the gas)__________________?
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A. T

B. ?T

C. 1/?T

D. T2

8299. The Joule-Thomson co-efficient is defined as (?T/?P)H. Its value at the inversion point is__________________?
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A. #NAME?

B. 1

C. ?

D. 0

8300. PVy = constant, holds good for an isentropic process, which is_________________?
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A. Reversible and isothermal

B. Isothermal and irreversible

C. Adiabatic and irreversible

D. Reversible and adiabatic

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