Chemical Engineering MCQs

6108 MCQs (Page 541 of 611)

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The heat capacity of most substances is greater for the _______________ state?

A. Solid
B. Liquid
C. Gaseous
D. None of these

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Isotopes are atoms having the same _____________________?

A. Mass number
B. Number of neutrons
C. Atomic mass
D. None of these

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The vapor pressures of benzene and toluene are 3 and 4/3 atmospheres respectively. A liquid feed of 0.4 moles of benzene and 0.6 moles of toluene is vaporised. Assuming that the products are in equilibrium, the vapor phase mole fraction of benzene is_________________?

A. 0.4
B. 0.6
C. 0.8
D. 0.2

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A sugar solution containing _________________ percent sugar is equivalent to 1 Brix?

A. 0.01
B. 0.1
C. 1
D. 10

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pH value of a solution containing 1 gm of hydrogen ion per litre will be ____________________?

A. 0
B. 1
C. 7
D. 10

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Equal masses of CH4 and H2 are mixed in an empty container. The partial pressure of hydrogen in this container expressed as the fraction of total pressure is___________________?

A. 1/9
B. 8/9
C. 1/2
D. 5/9

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No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules____________________?

A. Collide without loss of energy
B. Do work equal to loss in kinetic energy
C. Are above the inversion temperature
D. Exert no attractive force on each other

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Density of carbon dioxide is _________________ kg/Nm3 ?

A. 44/22400
B. 44/22.4
C. 22.4/44
D. None of these

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The ratio of existing moles of vapor per mole of vapor free gas to the moles of vapor that would be present per mole of vapor free gas, if the mixture were saturated at the existing temperature & pressure, is termed as the_____________________?

A. Relative humidity
B. Relative saturation
C. Percentage saturation
D. None of these

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Molar heat capacity of water in equilibrium with ice at constant pressure is_____________________?

A. 0
B. ∞
C. 1
D. None of these

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