Chemical Engineering Mcqs

Claude gas liquefaction process employs cooling___________________?

• (A)  At constant pressure
• (B)  By throttling
• (C)  By expansion in an engine
• (D)  None of these

Answer

Submitted By :Ali Uppal

Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be___________________?

• (A)  Same
• (B)  Doubled
• (C)  Halved
• (D)  One fourth of its original value

Answer

Submitted By :Ali Uppal

The activity of an ideal gas is numerically ____________ its pressure?

• (A)  More than
• (B)  Less than
• (C)  Equal to
• (D)  Data insufficient, can’t be predicted

Answer

Submitted By :Ali Uppal

Any substance above its critical temperature exists as _____________________?

• (A)  Saturated vapour
• (B)  Solid
• (C)  Gas
• (D)  Liquid

Answer

Submitted By :Ali Uppal

Clausius-Clapeyron Equation gives accurate result, when the __________________?

• (A)  Vapour pressure is relatively low and the temperature does not vary over wide limits
• (B)  Vapour obeys the ideal gas law and the latent heat of vaporisation is constant
• (C)  Volume in the liquid state is negligible compared with that in the vapour state
• (D)  All A,

Answer

Submitted By :Ali Uppal

In polytropic process (PVn = constant), if n = 1; it means a/an ______________ process?

• (A)  Adiabatic
• (B)  Reversible
• (C)  Isothermal
• (D)  None of these

Answer

Submitted By :Ali Uppal

Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass ?

• (A)  dE = Tds – PdV
• (B)  dQ = CvdT + PdV
• (C)  dQ = CpdT + Vdp
• (D)  Tds = dE – PdV

Answer

Submitted By :Ali Uppal

The internal energy of a gas obeying P (V – b) RT (where, b is a positive constant and has a constant Cv), depends upon its________________?

• (A)  Pressure
• (B)  Volume
• (C)  Temperature
• (D)  All A,

Answer

Submitted By :Ali Uppal

If the pressure on 100 c.c. of air is halved, then its volume (at the same temperature) would be ______________ c.c?

• (A)  100
• (B)  50
• (C)  205
• (D)  200

Answer

Submitted By :Ali Uppal

All gases above its inversion temperature, in a throttling process will show__________________?

• (A)  A heating effect
• (B)  No change in temperature
• (C)  A cooling effect
• (D)  Either

Answer

Submitted By :Ali Uppal