Chemical Engineering MCQs

Page No. 182

In osmosis through a semi-permeable membrane, diffusion of the___________________?


a Solvent is from low concentration to high concentration region


b Solvent is from high concentration to low concentration region


c Solute takes place


dNone of these



Cp is expressed in S.I. unit as_______________?


aJ/kg.°K


b0°K


cW/m2.°C


dW/m.°K


View Answer J/kg.°K

Increasing the temperature of an aqueous solution will cause decrease in its________________?


aMolality


bMole fraction


cWeight percent


dMolarity


View Answer Molarity

A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be Cp = 29.1 J/mole.°C and, Cv = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is__________________?


a13728 J


b19206 J


c4576 J


d12712 J


View Answer 19206 J

Enthalpy of formation of NH3 is – 46 kJ/kg mole. The enthalpy change for the gaseous reaction, 2NH3 → N2 + 3H2, is equal to _____________ kJ/kg. mole?


a46


b92


c-23


d-92


View Answer 92

1 Pascal (unit of pressure) is equal to _______________ N/m2 ?


a10


b1


c0.1


d1000


View Answer 1000

Pick out the wrong unit conversion of mass transfer co-efficient?


a1 lb/hr.ft3.atm. = 4.8182 kg/hr.m2.bar


b1 kg/hr.m2.atm= 0.98687 kg/hr. m .bar


c 1 lb/hr.ft2 = 4.8823 kg/hr.m2


d1 kg/hr.m2 = 4.8823 lb/hr.ft2



Heat of solution in a system in which both solute and solvent are liquids is termed as_________________?


aHeat of solvation


b Heat of hydration


cStandard integral heat of solution


dHeat of mixing


View Answer Heat of mixing

The vapor pressure of liquids of similar chemical nature at any particular temperature _______________ with increase in the molecular weight?


aIncreases


bDecreases


c Remains unchanged


dEither A. or B.; depends on the liquid


View Answer Decreases

A chemical process is said to occur under unsteady state, if the_________________?


aInventory changes do not take place


bRatio of streams entering/leaving are independent of time


cFlow rates & composition both are time dependent


dNone of these



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