🏭Chemical Engineering MCQs
Chemical Engineering MCQs
496 MCQs291
The number of degrees of freedom at the triple point of water is__________________?
A0
B1
C2
D3
292
The chemical potential for a pure substance is ____________ its partial molal free energy?
AMore than
BLess than
CEqual to
DNot related to
293
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
294
Enthalpy ‘H’ is defined as___________________?
AH = E – PV
BH = F – TS
CH – E = PV
DNone of these
295
The Joule-Thomson co-efficient is defined as (∂T/∂P)H. Its value at the inversion point is__________________?
A∞
B1
C0
D-ve
296
When a gas in a vessel expands, its internal energy decreases. The process involved is________________?
AReversible
BIrreversible
CIsothermal
DAdiabatic
297
For a single component two phase mixture, the number of independent variable properties are_________________?
ATwo
BOne
CZero
DThree
298
Gibbs-Duhem equation_____________________?
AStates that n1dμ1 + n2dμ2 + ….njdμj = 0, for a system of definite composition at constant temperature and pressure
BApplies only to binary systems
CFinds no application in gas-liquid equilibria involved in distillation
DNone of these
299
Entropy change of mixing two liquid substances depends upon the_________________?
Anor B
BQuantity (i.e. number of moles)
CBoth
DNeither
300
Free energy change at equilibrium is____________________?
AZero
BPositive
CNegative
DIndeterminate