Chemical Engineering Mcqs

For organic compounds, group contribution method can be used for the estimation of _____________________?

• (A)  Critical properties
• (B)  Specific gravity
• (C)  Specific volume
• (D)  Thermal conductivity

Answer

Submitted By :Ali Uppal

Which of the following represents the Virial equation of state ?

• (A)  T = [RT/(V- b)] – [a/√T. V(V + b)]
• (B)  PV/RT = 1 + (B/V) + (C/V2) + ……
• (C)  n1u2 + μ2μ1 = 0
• (D)  None of these

Answer

Submitted By :Ali Uppal

The value of Cp & Cv respectively for monatomic gases in Kcal/kg Mole.°K are________________?

• (A)  5 & 3
• (B)  3.987 & 1.987
• (C)  1.987 & 0.66
• (D)  0.66 & 1.987

Answer

Submitted By :Ali Uppal

The temperature at the eutectic point of the system is the _____________ temperature that can be attained in the system?

• (A)  Lowest
• (B)  Highest
• (C)  Average
• (D)  None of these

Answer

Submitted By :Ali Uppal

For an ideal gas, the internal energy depends upon its ____________ only?

• (A)  Molecular size
• (B)  Temperature
• (C)  Volume
• (D)  Pressure

Answer

Submitted By :Ali Uppal

The expression, ΔG = nRT. ln(P2/P1), gives the free energy change______________?

• (A)  With pressure changes at constant temperature
• (B)  Under reversible isothermal volume change
• (C)  During heating of an ideal gas
• (D)  During cooling of an ideal gas

Answer

Submitted By :Ali Uppal

Steam undergoes isentropic expansion in a turbine from 5000 kPa and 400°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_______________?

• (A)  Superheated vapour
• (B)  Partially condensed vapour with quality of 0.9
• (C)  Saturated vapour
• (D)  Partially condensed vapour with quality of 0.1

Answer

Submitted By :Ali Uppal

If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH4(g) + C2H4(g) ⇌ C3H8(g) will be _____________ Kcal?

• (A)  -19.4
• (B)  -30.2
• (C)  55.2
• (D)  -55.2

Answer

Submitted By :Ali Uppal

Which of the following liquid metals has the highest thermal conductivity ?

• (A)  Molten sodium
• (B)  Molten lead
• (C)  Mercury
• (D)  Molten potassium

Answer

Submitted By :Ali Uppal

High _____________ is an undesirable property for a good refrigerant?

• (A)  Specific heat
• (B)  Latent heat of vaporisation
• (C)  Viscosity
• (D)  Specific vapor volume

Answer

Submitted By :Ali Uppal