Chemical Engineering MCQs

Page No. 420

If 1.5 moles of oxygen combines with aluminium to form Al2O3, then the weight of aluminium (atomic weight = 27) used in this reaction is __________ gm?


a27

✖


b54

✓


c54

✖


d2.7

✖


View Answer 54

In physical adsorption, as compared to chemisorption, the________________________?


aQuantity adsorbed per unit mass is higher

✓


bRate of adsorption is controlled by the resistance to surface reaction

✖


cActivation energy is very high

✖


dHeat of adsorption is very large

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1 bar is almost equal to __________________________ atmosphere?


a1

✓


b10

✖


c100

✖


d1000

✖


View Answer 1

Two solutions A1 and A2 have pH value of 2 and 6 respectively. It implies that the solution_____________________?


aA2 is more alkaline than solution A2

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bA1 is highly acidic

✖


cA1 is very slightly acidic

✖


dBoth A. & C.

✓


View Answer Both A. & C.

Osmotic pressure of the solution can be increased by_________________?


aDecreasing its temperature

✖


bIncreasing the volume of the vessel containing the solution

✖


cDiluting the solution

✖


dNone of these

✓


View Answer None of these

Pick out the wrong statement about the recycle stream in a process ?


aRecycling in a process stream helps in utilising the valuable reactants to the maximum with minimum loss of reactants

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bThe ratio of the quantity of a reactant present in the reactor feed of a recycling operation to the quantity of the same reactant entering the process as fresh feed is called combined feed ratio

✖


cRecycling in a process does not help in getting higher extent of reaction

✓


dRecycling is exemplified by refluxing back a part of the distillate to the distillation column to maintain the quantity of liquid within the column

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Saturated molal absolute humidity of the vapor-gas mixture depends upon the______________________?


aVapor pressure at dry bulb temperature

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bTotal pressure

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cBoth A. and B.

✓


dNeither A. nor B.

✖


View Answer Both A. and B.

Measurement of the amount of dry gas collected over water from volume of moist gas is based on the___________________?


aCharle’s law

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bDalton’s law of partial pressures

✓


cAvogadro’s hypothesis

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dBoyle’s law

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How many phases are present at eutectic point ?


a2

✖


b1

✖


c3

✓


dunpredictable

✖


View Answer 3

The atomic heat capacities of all solid elements ______________ with decrease in temperature?


aIncreases

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bDecreases

✓


cRemains unchanged

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dApproach zero at 0°C

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View Answer Decreases

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