chemical engineering thermodynamics for chemical chemical engineering MCQs – Page 13

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering thermodynamics for chemical chemical engineering Mcqs
241. Charles law for gases states that__________________?
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A. V ? 1/P

B. V/T = Constant

C. V ? 1/T

D. PV/T = Constant

242. The theoretical minimum work required to separate one mole of a liquid mixture at 1 atm, containing 50 mole % each of n- heptane and n- octane into pure compounds each at 1 atm is__________________?
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A. -RT ln 0.5

B. 2 RT

C. 0.5 RT

D. -2 RT ln 0.5

243. Joule-Thomson co-efficient depends on the_____________________?
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A. Pressure

B. Temperature

C. Both A. & B

D. Neither A. nor B

244. Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ______________ with the increase of reduced temperature?
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A. Decreases logarithmically

B. Decreases

C. Increases

D. Remains constant

245. For the reversible exothermic reaction, N2 + 3H2 ? 2NH3, increase of pressure would________________?
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A. Shift the equilibrium towards right

B. Give higher yield of NH3

C. Both B. and C

D. Neither A. nor B

246. Isotherm on an enthalpy-concentration diagram, for an ideal solution will be a __________________?
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A. Sine curve

B. Straight line

C. Parabola

D. Hyperbola

247. Measurement of thermodynamic property of temperature is facilitated by ____________ law of thermodynamics?
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A. Zeroth

B. None of these

C. 3rd

D. 1st

248. _____________ calorimeter is normally used for measuring the dryness fraction of steam, when it is very low?
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A. Separating

B. Throttling

C. A combination of separating & throttling

D. Bucket

249. For multi-component multiple phases to be in equilibrium at the same pressure and temperature, the _______________ of each component must be same in all phases?
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A. Chemical potential

B. Fugacity

C. Both A. and B

D. Neither A. nor B

250. In the equation, PVn = constant, if the value of n is in between 1 and y (i.e. Cp/Cv), then it represents a reversible ____________ process?
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A. Isentropic

B. Isometric

C. Isobaric

D. Polytropic
251. Gibbs phase rule finds application, when heat transfer occurs by___________________?
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A. Conduction

B. Radiation

C. Convection

D. Condensation
252. With increase in pressure (above atmospheric pressure), the Cp of a gas_____________________?
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A. Decreases

B. Increases

C. Remains unchanged

D. First decreases and then increases

253. For organic compounds, group contribution method can be used for the estimation of _____________________?
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A. Critical properties

B. Specific gravity

C. Specific volume

D. Thermal conductivity

254. For a real gas, the chemical potential is given by_____________________?
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A. None of these

B. RT d ln P

C. RT d ln f

D. R d ln f

255. Fugacity is a measure of the____________________?
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A. None of these

B. Behaviour of ideal gases

C. Relative volatility of a mixture of two miscible liquids

D. Escaping tendencies of the same substance in different phases of a system
256. Molar heat capacity of water in equilibrium with ice at constant pressure is __________ Kcal/kg mole. K___________________?
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A. 50

B. ?

C. 100

D. 0

257. Which is a state function ?
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A. Pressure

B. Work

C. Temperature

D. Specific volume

258. The ammonia synthesis reaction represented by N2 + 3H2 ? 2NH3; ?H = 22.4 kcal, is__________________?
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A. Isothermal

B. Endothermic

C. Exothermic

D. Adiabatic

259. Pick out the Clausius-Clapeyron equation from the following?
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A. dP/dT = ?H/T?V

B. None of these

C. ln P = (?H/RT) + constant

D. ?F = ?H + T [?(?F)/?T]P

260. Gases are cooled in Joule-Thomson expansion, when it is _____________ inversion temperature?
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A. Below

B. Above

C. At

D. Either B. or C.