chemical engineering MCQs – Page 418

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 Review each marked answer and report any item that may be outdated or unclear.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
8341. Which of the following is not an equation of state ?
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A. Beattie-Bridgeman equation

B. Bertholet equation

C. Clausius-Clapeyron equation

D. None of these

8342. The number of degrees of freedom for a mixture of ice and water (liquid) are ____________________?
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A. 2

B. 1

C. 3

D. 0

8343. Internal energy of an element at 1 atm and 25 C is ____________ kcal/kg.mole?
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A. 273

B. None of these

C. 0

D. 25

8344. For a single component two phase mixture, the number of independent variable properties are_________________?
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A. Two

B. Zero

C. One

D. Three

8345. A limiting reactant is the one, which decides the ____________ in the chemical reaction?
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A. Rate constant

B. Conversion

C. None of these

D. Equilibrium constant

8346. Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is__________________?
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A. 1

B. 4

C. 3

D. 2
8347. Out of the following refrigeration cycles, which one has the minimum COP (Co-efficient of performance) ?
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A. Vapour compression with a reversible expansion engine

B. Air cycle

C. Ordinary vapour compression cycle

D. Carnot cycle

8348. Heating of water under atmospheric pressure is an ______________ process?
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A. Isobaric

B. Adiabatic

C. Isothermal

D. Isochoric

8349. Clausius-Clapeyron equation is applicable to _____________ equilibrium processes?
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A. All A, B. and C

B. Solid-liquid

C. Liquid-vapor

D. Solid-vapor

8350. Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg. K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is_______________?
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A. Saturated vapour

B. Superheated vapour

C. Partially condensed vapour with quality of 0.1

D. Partially condensed vapour with quality of 0.9

8351. Co-efficient of Performance (COP) of a refrigerator is the ratio of the ______________________?
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A. Higher to lower temperature

B. Work required to refrigeration obtained

C. Refrigeration obtained to the work required

D. Lower to higher temperature

8352. When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature and pressure), then chemical potential of each component is___________________?
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A. Same in both the phases

B. Zero in both the phases

C. More in vapour phase

D. More in liquid phase

8353. Maxwells relation corresponding to the identity, dH = dS = Vdp + ??i dni is_____________________?
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A. (?S/?P)T, ni = (?V/?T)P, ni

B. (?T/?V)S, ni = -(?P/?S)V, ni

C. (?S/?V)T, ni = (?P/?T)V, ni

D. (?T/?P)S, ni = (?V/?S)P, ni
8354. Compressibility factor (i.e., the ratio of actual volume of gas to the volume predicted by ideal gas law) for all gases are_______________?
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A. Always greater than one

B. Same at the same reduced temperature

C. Same at the same reduced pressure

D. Both B. & C
8355. All gases above its inversion temperature, in a throttling process will show__________________?
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A. Either A. or (C)

B. No change in temperature

C. A cooling effect

D. A heating effect
8356. Chemical potential is a/an_____________________?
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A. Extensive property

B. Intensive property

C. Force which drives the chemical system to equilibrium

D. Both B. and C
8357. One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one ________________?
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A. Day

B. Second

C. Hour

D. Minute

8358. (?H/?T)P is the mathematical expression for____________________?
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A. Gibbs free energy

B. None of these

C. CV

D. Entropy change

8359. If an ideal solution is formed by mixing two pure liquids in any proportion, then the ___________________ of mixing is zero?
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A. Enthalpy

B. Volume

C. Both A. & B.

D. Neither A nor B

8360. At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be________________?
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A. More or less; depending on the system

B. Same

C. More

D. Less