Chemical Engineering MCQs

Page No. 178

In a turbine, the fluid expands almost_________________?


aIsothermally


bIsobarically


cAdiabatically


dNone of these


View Answer Adiabatically

The number of degrees of freedom at the triple point of water is__________________?


a 0


b1


c2


d3


View Answer 0

The chemical potential for a pure substance is ____________ its partial molal free energy?


a More than


bLess than


c Equal to


dNot related to


View Answer Equal to

A closed system is cooled reversibly from 100°C to 50°C. If no work is done on the system________________?


aits internal energy (U) decreases and its entropy (S) increases


bU and S both decreases


cU decreases but S is constant


dU is constant but S decreases



Enthalpy ‘H’ is defined as___________________?


aH = E – PV


bH = F – TS


cH – E = PV


dNone of these


View Answer H – E = PV

The vapor pressure of water at 100°C is__________________?


a100 N/m2


b76 cms of Hg


c13.6 cms of Hg


d 760 mm wc


View Answer 76 cms of Hg

The OH- concentration in a solution having pH value 3 is____________________?


a10-3


b 10-10


c10-11


d10-13


View Answer 10-11

Kinetic theory of gases stipulates that, the____________________?


aEnergy is lost during molecular collisions


b Molecules possess appreciable volume


c Absolute temperature is a measure of the kinetic energy of molecules


dNone of these



pH value of H2SO4 (5% concentration) is__________________?


a 5


b7


c > 7


d< 7


View Answer < 7

Raoult’s law is not applicable to the___________________?


a Solutes which dissociate or associate in the particular solution


bConcentrated solutions


cBoth B. & C.


dSolutions containing non-volatile solute


View Answer Both B. & C.

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