A. Inventory changes do not take place
B. Ratio of streams entering/leaving are independent of time
C. Flow rates & composition both are time dependent
D. None of these
Related Mcqs:
- Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is________________?
A. 0
B. 1
C. ∞
D. None of these - At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.) ?
A. μ° + RT ln f
B. μ°+ R ln f
C. μ° + T ln f
D. μ° + R/T ln f - Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the_________________?
A. Recycling
B. Purging
C. Bypassing
D. Recirculation - “The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances”. This is the_________________?
A. Lewis-Randall rule
B. Statement of Van’t Hoff Equation
C. Le-Chatelier’s principle
D. None of these - A chemical reaction will occur spontaneously at constant pressure and temperature, if the free energy is________________?
A. Zero
B. Positive
C. Negative
D. None of these - A system undergoes a change from a given initial state to a given final state either by an irreversible process or by a reversible process, then (where, Δ S1 and Δ SR are the entropy changes of the system for the irreversible and reversible processes respectively) ?
A. Δ S1 is always Δ SR
C. Δ S1 is always > Δ SR
D. Δ S1 is always = Δ SR - Chemical engineering thermodynamics is concerned with the ____________ in/of chemical processes?
A. Reaction mechanism
B. Calculation of rates
C. Energy transformation from one form to another
D. None of these - The heat capacities for the ideal gas state depend upon the_________________?
A. Pressure
B. Temperature
C. Both A. & B.
D. Neither A. nor B. - Under conditions of equal reduced pressure and equal reduced temperature, substances are said to be in the ‘corresponding states’. At equal reduced conditions i.e., at the corresponding state, the ____________ of different gases are nearly the same?
A. Compressibility
B. Molecular weight
C. Humidity
D. None of these - In a chemical process, the recycle stream is purged for______________________?
A. Increasing the product yield
B. Enriching the product
C. Limiting the inerts
D. Heat conservation
