chemical engineering MCQs – Page 414

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 Review each marked answer and report any item that may be outdated or unclear.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

8261. With increase in reduced temperature, the fugacity co-efficient of a gas at constant reduced pressure___________________?
0

A. Decreases

B. Remain same

C. Decreases linearly

D. Increases

8262. As pressure approaches zero, the ratio of fugacity to pressure (f/P) for a gas approaches____________________?
0

A. Zero

B. An indeterminate value

C. Unity

D. Infinity

8263. Which of the following is Virial equation of state ?
0

A. None of these

B. PV = nRT

C. (p + a/V2)(V b) = nRT

D. PV = A + B/V + C/V2 + D/V3 +

8264. The absolute entropy for all crystalline substances at absolute zero temperature is ____________________?
0

A. Zero

B. More than zero

C. Indeterminate

D. Negative

8265. Fugacity is most helpful in____________________?
0

A. The study of chemical equilibria involving gases at atmospheric pressure

B. Representing actual behaviour of real gases

C. Representing actual behaviour of ideal gases

D. None of these

8266. Consider the reaction, C + O2 ? CO2; ?H = 94 kcal. What will be the value of ?H for the reaction CO2 ? C + O2 ?
0

A. -94 kcal

B. +94 kcal

C. < -94 kcal

D. > 94 kcal

8267. Refrigerants commonly used for domestic refrigerators are_________________?
0

A. Freon-12

B. NH3 or CO2

C. Ethyl chloride or methyl chloride

D. Propane

8268. The gas law (PV = RT) is true for an ______________ change?
0

A. Isothermal

B. Adiabatic

C. Both A. & B

D. Neither A. nor B

8269. The extensive properties are____________________?
0

A. Volume, mass and number of moles

B. Free energy, entropy and enthalpy

C. Both A. and B

D. None of these

8270. Internal energy of an ideal gas___________________?
0

A. Is independent of temperature

B. None of these

C. Increases with increase in pressure

D. Decreases with increase in temperature

8271. The four properties of a system viz. P, V, T, S are related by ______________ equation?
0

A. Maxwells

B. Gibbs-Duhem

C. None of these

D. Gibbs-Helmholtz

8272. Recycling in a chemical process facilitates___________________?
0

A. Heat conservation

B. All A., B. & C.

C. Increased yield

D. Enrichment of product

8273. Refrigeration capacity of a household refrigerator may be round about _____________ tons?
0

A. 1.5

B. 6.5

C. 4.5

D. 0.15

8274. The melting point of paraffin wax (which contracts on solidification) _______________ with pressure rise?
0

A. Increases

B. Decreases linearly

C. Remains unchanged

D. Decreases

8275. Entropy change of mixing two liquid substances depends upon the_________________?
0

A. Molar concentration

B. Quantity (i.e. number of moles)

C. Both A. and B

D. Neither A. nor B

8276. Which of the following is not a unit of the equilibrium constant Kp? (where, ?x = number of moles of products number of moles of reactants) ?
0

A. Dimensionless, when ?x = 0

B. (atm)?x, when ?x is positive

C. (atm)?x2, when ?x > 0

D. (atm)?x, when ?x is negative

8277. Heat of transition is the heat evolved or absorbed, when a substance is converted from_________________?
0

A. Solid to liquid

B. One allotropic form to another allotropic form

C. Vapor to solid

D. Vapor to liquid

8278. What is the value of ln y (where y = activity co-efficient) for ideal gases ?
0

A. Unity

B. Zero

C. Negative

D. Infinity

8279. PV? = Constant (where, ? = Cp/Cv) is valid for a/an ______________ process?
0

A. Isothermal

B. Isentropic

C. Adiabatic

D. Isobaric

8280. For a constant volume process _____________ by the system is used only to increase the internal energy?
0

A. Heat absorbed

B. Work done

C. Both A. & B

D. Neither A. nor B

Previous Next

Showing 8261 to 8280 of 8709 mcqs