chemical engineering MCQs – Page 431

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 Review each marked answer and report any item that may be outdated or unclear.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

8601. ______________ equation gives the effect of temperature on heat of reaction ?
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A. Maxwells

B. Kistyakowsky

C. Kirchoffs

D. Antoine

8602. Assuming that CO2 obeys perfect gas law, calculate the density of CO2 (in kg/m3) at 263C and 2 atm ?
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A. 2

B. 3

C. 4

D. 1

8603. Which of the following rock favors petroleum formation?
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A. Igneous rock

B. Metamorphic rock

C. None of these

D. Sedimentary rock

8604. The most convenient way of expressing solution concentration is in terms of___________________?
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A. Mole fraction

B. Normality

C. Molarity

D. Molality

8605. The most blister form of copper is__________?
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A. refined copper

B. impure copper

C. none of these

D. processed copper

8606. On mixing 56 gm of CaO with 63 gm of HNO3, the amount of Ca(NO3)2 formed is ______________ gm?
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A. 164

B. 8.2

C. 82

D. 41

8607. For the gaseous phase reaction, N2 + O2 ? 2NO, ?H = + 80 kJ/kg. mole; the decomposition of NO is favoured by____________________?
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A. Decrease in pressure

B. Decrease in temperature

C. Increasing the concentration of N2

D. Increase in pressure

8608. If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its___________________?
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A. Bubble point

B. Saturation temperature

C. Dew point

D. Both B. and C.

8609. No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules____________________?
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A. Exert no attractive force on each other

B. Are above the inversion temperature

C. Collide without loss of energy

D. Do work equal to loss in kinetic energy

8610. If pH value of a solution is 8, then its pOH value will be ____________________?
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A. 10

B. 1

C. 7

D. 6

8611. Percentage saturation of a vapor bearing gas is always _____________ the relative saturation?
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A. Either A. or B.; depends on the system

B. Smaller than

C. Equal to

D. Higher than

8612. With increase in temperature, the surface tension of water _____________________?
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A. Remain constant

B. Decreases

C. Increases linearly

D. Increases

8613. Enthalpy change resulting, when unit mass of solid is wetted with sufficient liquid, so that further addition of liquid produces no additional thermal effect, is called the heat of________________?
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A. Complete wetting

B. Adsorption

C. Wetting

D. Mixing

8614. A butane isomerisation process produces 70 k.mole/hr of pure iso-butane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be_________________?
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A. 6 kmole/hr

B. 4 kmole/hr

C. 3 kmole/hr

D. 5 kmole/hr

8615. Pick out the wrong statement?
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A. perature at which heat is rejected increases

B. Refrigeration cycle is normally represented by a temperature vs. entropy plot

C. In a refrigerator, work required decreases as the temperature of the refrigerator and the

D. A refrigeration cycle violates the second law of thermodynamics

E. One ton of refrigeration is equivalent to the rate of heat absorption equal to 3.53 kW

8616. Pick out the correct statement ?
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A. e than the partial pressure of the vapor at the same temperature

B. Heat added to or given up by a substance at constant temperature is called the sensible heat

C. The end points of a vapor-pressure vs. temperature curve are critical and triple points

D. A mixture of vapor gas is called saturated, if the equilibrium vapor pressure of the liquid is

E. A substance existing above its critical temperature is called a saturated vapor

8617. Vapor pressure of water at 100C is about _______________ bar?
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A. 10.13

B. 0.1013

C. 1.013

D. 101.3

8618. Pick out the wrong statement ?
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A. Coals are divided in four species according to their carbon content in Seylors classification

B. Carburetted water gas is also called blue gas

C. Gross and net calorific value of a fuel is the same, if it does not contain hydrogen or

D. Carbonisation time in a by-product coke oven is about 16 hours

E. rocarbons

8619. How much O2 can be obtained from 90 kg of water ?
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A. 80 kg

B. 64 kg

C. 90 kg

D. 32 kg

8620. Boiling point of a solution as compared to that of the corresponding solvent is _________________?
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A. Less

B. Either more or less; depends upon the solvent

C. More

D. Same

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