chemical engineering stoichiometry MCQs – Page 3

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering stoichiometry Mcqs
41. Dry air is a mixture of__________________?
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A. Vapors

B. Gases

C. Both A. & B.

D. Neither A. nor B.

42. 1 bar is almost equal to __________________________ atmosphere?
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A. 1

B. 1000

C. 10

D. 100

43. A metal oxide is reduced by heating it in a stream of hydrogen. After complete reduction, it is found that 3.15 gm of the oxide has yielded 1.05 gm of the metal. It may be inferred that the ____________________?
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A. Atomic weight of the metal is 2

B. Equivalent weight of the metal is 8

C. Equivalent weight of the metal is 4

D. Atomic weight of the metal is 4

44. The pressure of V litres of a dry gas is increased from 1 to 2 kgf/cm2 at a constant temperature. The new volume will become___________________?
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A. V2

B. V/2

C. 2V

D. V/4

45. The reaction A + B ? C has been conducted in a reactor as shown below. The numbers of balances (material) that can be made around the reactor are________________?
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A. 2

B. 3

C. 1

D. 4

46. The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg.mole respectively. The order of decreasing inter-molecular forces in these liquids is________________?
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A. CS2 > H2O > C2H5OH

B. CS2 > C2H5OH > H2O

C. H2O > CS2 > C2H5OH

D. H2O > C2H5OH > CS2
47. Which of the following ideal gas laws are not applicable to mixture of gases ?
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A. Amagats law

B. Daltons law

C. Boyles law & Charles Law

D. None of these

48. At 100C, water and methylcyclohexane both have vapour pressures of 1 atm. Also at 100C, the latent heats of vaporisation of these compounds are 40.63 kJ/mole for water and 31.55 kJ/mole for methylcyclohexane. The vapour pressure of water at 150C is 4.69 atm. At 150C, the vapour pressure of methylcyclohexane would be expected to be_________________?
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A. Nearly equal to 4.69 atm

B. Significantly less than 4.69 atm

C. Significantly more than 4.69 atm

D. Indeterminate due to lack of data

49. An equation for calculating vapour pressure is given by, log10 P = A B(t + c). This is called the________________?
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A. Kopps rule

B. Kistyakowsky equation

C. Antoine equation

D. Troutons rule

50. Osmotic pressure of a dilute solution of a non volatile solute in a solvent obeying Raoults law is proportional to the_____________?
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A. Temperature

B. Volume of solution

C. None of these

D. Moles of non-volatile solute

51. A saturated vapor on being compressed would___________________?
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A. Condense

B. Form wet steam

C. Both A. & B.

D. Neither A. nor B.

52. Which of the following holds good for a solution obeying Raoults law (i.e., an ideal solution) (where, ?H = heat of mixing, and ?V = volume change on mixing) ?
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A. ?H = 1 (+ ve) and ? V = -ve

B. ?H = 0

C. ?V = 0

D. Both B. and C.
53. One micron is equal to _____________ cm?
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A. 6-Oct

B. 8-Oct

C. 10-4

D. 2-Oct

54. Boiling point of a non-homogeneous mixture of immiscible liquids is _____________ that of any one of its separate components?
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A. Higher than

B. Lower than

C. Either A. or B.; depends on the liquids

D. Equal to

55. Kopps rule is useful for the determination of_____________________?
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A. Heat capacities of gases

B. Activation energy

C. Heat capacities of solids

D. Molal heat capacities of gases

56. A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal______________?
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A. Potential energy

B. Kinetic energy

C. Intermolecular forces of attraction

D. Total energy

57. A reduction process is accompanied with increase in the_______________?
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A. Number of electrons

B. Oxidation number

C. Both A. & B.

D. Neither A. nor B.

58. The unit of specific heat at constant pressure, Cp, in SI unit is__________________?
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A. J/m3K

B. W/mK

C. W/m2C

D. J/kgK
59. The unit of dynamic viscosity is_________________?
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A. Stoke

B. Poise

C. gm/cm sec

D. Both B. & C.
60. Simultaneous doubling of the absolute temperature of a gas and reduction of its pressure to half will result in _____________ in the volume of the gas?
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A. No change

B. Doubling

C. Fourfold increase

D. 1/4th reduction