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



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


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


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



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


aVapor pressure at dry bulb temperature


bTotal pressure


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


bDalton’s law of partial pressures


cAvogadro’s hypothesis


dBoyle’s law



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


bDecreases


cRemains unchanged


dApproach zero at 0°C


View Answer Decreases

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