πChemical Engineering MCQs
Chemical Engineering MCQs
496 MCQs231
At the critical point of a substance____________?
AThe surface tension vanishes
Band C
CThere is no distinction between liquid and vapour phases
DAll A,
232
For any system, what is the minimum number of degrees of freedom ?
A0
B1
C2
D3
233
What is the degree of freedom for two miscible (non-reacting) substances in vapor-liquid equilibrium forming an azeotrope ?
A0
B1
C2
D3
234
The expression, ΞG = nRT. ln(P2/P1), gives the free energy change______________?
AWith pressure changes at constant temperature
BUnder reversible isothermal volume change
CDuring heating of an ideal gas
DDuring cooling of an ideal gas
235
Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400Β°C (entropy = 6.65 kJ/kg K) to 150 kPa) (entropy of saturated liquid = 1.4336 kJ/kg. K, entropy of saturated vapour = 7.2234 kJ/kg. K) The exit condition of steam is_______________?
ASuperheated vapour
BPartially condensed vapour with quality of 0.9
CSaturated vapour
DPartially condensed vapour with quality of 0.1
236
Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because_________________?
AThe strong base and strong acid reacts completely
BThe salt formed does not hydrolyse
COnly OH- and H+ ions react in every case
DThe strong base and strong acid reacts in aqueous solution
237
Heat of neutralisation of HCl and NaOH is β 57.46 kJ/Kg mole. The heat of ionisation of water will be _____________ kJ/Kg mole?
A57.46
B-57.46
C114.92
D-28.73
238
Which of the following is followed by an ideal solution ?
ABoyleβs law
BAmagatβs law
CRaoultβs law
DTroutonβs rule
239
The combustion equations of carbon and carbon monoxide are as follows: C + O2 = CO2, ΞH = β 394 kJ/kg .mole CO + Β½ O2 = CO2, ΞH = β 284.5 kJ/kg. mole. The heat of formation of CO is _____________ kJ/kg. mole?
A-109.5
B+109.5
C+180
D+100
240
Which of the following is not correct for a reversible adiabatic process ?
ATVΞ³-1 = constant
Bp1-Ξ³.TY = constant
CPVΞ³ = constant
DNone of these