Chemical Engineering Mcqs

Entropy is a measure of the _____________ of a system?

• (A)  Disorder
• (B)  Orderly behaviour
• (C)  Temperature changes only
• (D)  None of these

Answer

Submitted By :Ali Uppal

An isentropic process is carried out at constant____________________?

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

Answer

Submitted By :Ali Uppal

The total change in the enthalpy of a system is independent of the _______________________?

• (A)  Number of intermediate chemical reactions involved
• (B)  Pressure and temperature
• (C)  State of combination and aggregation in the beginning and at the end of the reaction
• (D)  None of these

Answer

Submitted By :Ali Uppal

Which of the following behaves most closely like an ideal gas ?

• (A)  He
• (B)  N2
• (C)  O2
• (D)  H2

Answer

Submitted By :Ali Uppal

For a multi-component system, the term chemical potential is equivalent to the ___________________?

• (A)  Molal concentration difference
• (B)  Molar free energy
• (C)  Partial molar free energy
• (D)  Molar free energy change

Answer

Submitted By :Ali Uppal

A refrigeration cycle is a reversed heat engine. Which of the following has the maximum value of the co-efficient of performance (COP) for a given refrigeration effect ?

• (A)  Vapor compression cycle using expansion valve
• (B)  Air refrigeration cycle
• (C)  Vapor compression cycle using expansion engine
• (D)  Carnot refrigeration cycle

Answer

Submitted By :Ali Uppal

Fugacity co-efficient of a substance is the ratio of its fugacity to__________________?

• (A)  Mole fraction
• (B)  Activity
• (C)  Pressure
• (D)  Activity co-efficient

Answer

Submitted By :Ali Uppal

As the entropy of the universe is increasing, day by day, the work producing capacity of a heat engine is_________________?

• (A)  Not changed
• (B)  Decreasing
• (C)  Increasing
• (D)  Data sufficient, can’t be predicted

Answer

Submitted By :Ali Uppal

The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is____________________?

• (A)  100,000 kW
• (B)  160,000 kW
• (C)  200,000 kW
• (D)  320,000 kW

Answer

Submitted By :Ali Uppal

Joule-Thomson experiment is__________________?

• (A)  Isobaric
• (B)  Adiabatic
• (C)  Isenthalpic
• (D)  Both

Answer

Submitted By :Ali Uppal