Chemical Engineering Mcqs

Boyle’s law for gases states that____________________?

• (A)  P ∝ 1/V, when temperature is constant
• (B)  P ∝ 1/V, when temperature & mass of the gas remain constant
• (C)  P ∝ V, at constant temperature & mass of the gas
• (D)  P/V = constant, for any gas

Answer

Submitted By :Ali Uppal

The efficiency of an Otto engine compared to that of a diesel engine, for the same compression ratio will be _______________?

• (A)  More
• (B)  Less
• (C)  Same
• (D)  Data insufficient to predict

Answer

Submitted By :Ali Uppal

With increase in pressure (above atmospheric pressure), the Cp of a gas_____________________?

• (A)  Increases
• (B)  Decreases
• (C)  Remains unchanged
• (D)  First decreases and then increases

Answer

Submitted By :Ali Uppal

PVy = constant, holds good for an isentropic process, which is_________________?

• (A)  Reversible and isothermal
• (B)  Isothermal and irreversible
• (C)  Reversible and adiabatic
• (D)  Adiabatic and irreversible

Answer

Submitted By :Ali Uppal

As the temperature is lowered towards the absolute zero, the value of ∂(ΔF)/∂T, then approaches_______________________?

• (A)  Unity
• (B)  Zero
• (C)  That of the heat of reaction
• (D)  Infinity

Answer

Submitted By :Ali Uppal

Which of the following is a thermodynamic property of a system ?

• (A)  Concentration
• (B)  Mass
• (C)  Temperature
• (D)  Entropy

Answer

Submitted By :Ali Uppal

In reactions involving solids and liquids (where change in volume is negligible), the heat of reaction at constant pressure as compared to that at constant volume is_______________?

• (A)  More
• (B)  Less
• (C)  Same
• (D)  Unpredictable; depends on the particular reaction

Answer

Submitted By :Ali Uppal

_____________ law of thermodynamics ascertains the direction of a particular spontaneous process?

• (A)  Zeroth
• (B)  First
• (C)  Second
• (D)  Third

Answer

Submitted By :Ali Uppal

On opening the door of an operating refrigerator kept in a closed room, the temperature of the room will____________________?

• (A)  Increase
• (B)  Decrease
• (C)  Remain same
• (D)  Increase in summer and will decrease in winter

Answer

Submitted By :Ali Uppal

Free energy, fugacity and activity co-efficient are all affected by change in the temperature. The fugacity co-efficient of a gas at constant pressure ______________ with the increase of reduced temperature?

• (A)  Decreases
• (B)  Increases
• (C)  Remains constant
• (D)  Decreases logarithmically

Answer

Submitted By :Ali Uppal