Chemical Engineering MCQs

Page No. 408

What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-xylene at 100°C, if their vapor pressures at 100°C are 1340, 560 and 210 mmHg respectively ?


a756.2


b756.2


c801.5


d880.5


View Answer 801.5

The evaporation of aqueous solution of sugar causes its molarity to__________________?


aDecrease


bIncrease


cRemain unchanged


dEither A. or B.; depends on the concentration of the solution


View Answer Remain unchanged

Under conditions of equal reduced pressure and equal reduced temperature, substances are said to be in the ‘corresponding states’. At equal reduced conditions i.e., at the corresponding state, the ____________ of different gases are nearly the same?


aCompressibility


bMolecular weight


cHumidity


dNone of these


View Answer Compressibility

The heat of adsorption of a gas caused by Van der Waals forces of attraction and capillarity is equal to the heat of__________________?


aNormal condensation


bWetting


cSum of A. and B.


dDifference of A. and B.


View Answer Sum of A. and B.

1 BTU/ft3 is approximately equal to _____________ kcal/m3?


a1


b9


c4


d252


View Answer 9

A solution is made by dissolving 1 kilo mole of solute in 2000 kg of solvent. The molality of the solution is_________________?


a2


b1


c0.5


d0.05


View Answer 0.5

Avogadro number is the number of molecules in one ____________ of a gas?


agram


bKilogram


cgm.mole


dLitre


View Answer gm.mole

Which equation is not an equation of state ?


aPV = RT + B/V + y/V2 + ….


b(P + a/V2)(V-b) = RT


cloge (p/p0) = (λ/R) (1/T0 – 1/T)


dp = [RT/(V – b)] – (a/TV2)



A sample of well water contains 140 gm/m3 Ca2+ ions and 345 gm/m3 Na+ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO3 in gm/m3 is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16) ?


a350


b485


c140


d345


View Answer 350

For a reaction, X → Y, if the concentration of ‘X’ is tripled; the rate becomes nine times. The order of reaction is__________________?


a0


b1


c2


d3


View Answer 2

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