Chemical Engineering - MCQ Practice Questions

In a plug flow reactor (PFR), what is the relationship between conversion and reactor volume for a first-order reaction?

What is the order of reaction if the half-life period is independent of initial concentration?

In consecutive reactions A → B → C (both first-order), maximum concentration of intermediate B occurs at which time?

Which reactor configuration provides the highest conversion for an endothermic reaction at equilibrium?

For the reaction A + B → C, the rate law is r = kC_A²C_B. What is the overall order of reaction?

In a CSTR operating at steady state, if volumetric flow rate increases while keeping concentration constant, what happens to conversion?

What does the Damköhler number (Da) represent in reactor design?

For a reversible reaction at equilibrium, which statement is true?

In a reactor with catalyst deactivation following first-order decay, what is the effect on reactant conversion over time?

Which of the following statements about adiabatic reactors is correct?

For competitive-consecutive reactions: A → B (k₁), A → C (k₂), B → D (k₃), selectivity of B over C is defined as S_B/C = ?

What is the space-time (τ) in a PFR if reactor volume is 100 L and volumetric feed rate is 10 L/min?

In microbial fermentation kinetics, the Monod equation models specific growth rate. What happens when substrate concentration >> K_s?

For isothermal batch reactor with r = -dC_A/dt = kC_A^n, what is the integrated rate law for n=2?

Thiele modulus (φ) represents the ratio of which two parameters in heterogeneous catalysis?

In CSTR, if inlet concentration C_A0 = 2 M, outlet concentration C_A = 0.5 M, what is fractional conversion?

For a reaction with activation energy E_a = 50 kJ/mol, by what factor does rate constant increase if temperature increases from 300K to 310K? (R = 8.314 J/mol·K)

In a recycle reactor with recycle ratio R, what is the volume reduction factor compared to PFR for equivalent conversion?

For homogeneous gas-phase reaction in batch reactor, if pressure increases at constant volume, what happens to reaction rate for 2A → Products?

In a CSTR operating at steady state with a first-order irreversible reaction A → B, if the volumetric flow rate is doubled while keeping reactor volume constant, how does the conversion of reactant A change?