Chemical Reaction Engineering MCQs

Consider the n^th order irreversible liquid phase reaction A → B. Which one of the following plots involving half life of the reaction $$\left( {{{\text{t}}_{\frac{1}{2}}}} \right)$$  and the initial reactant concentration (C_A0) gives a straight line plot?

The time needed to achieve the same fractional conversion for particles of different sizes (d) when chemical reaction controls, is proportional to

For a heterogenous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate -r_A0 is invariant with total pressure. The rate controlling step is

At a given temperature, K₁, K₂ and K3 are equilibrium constants for the following reactions 1, 2, 3 respectively.
CH₄(g) + H₂O(g) ⇋ CO(g) + 3H₂(g),
CO(g) + H₂O(g) ⇋ CO₂(g) + H₂(g)
CH₄(g) + 2H₂O(g) ⇋ CO₂(g) + 4H₂(g)
Then K₁, K₂ and K3 are related as:

Considering the endotheomic dissociation of CaCO₃ in a closed vessel (CaCO₃ ⇋ CaO + CO₂), the pressure of CO₂ increases, if

The rate of the reaction, X → Y, quadruples when the concentration of 'X' is doubled. The rate expression for the reaction is, r = K C_xⁿ, the value of 'n' in this case will be

If the pore diffusion controls in a catalytic reaction, the apparent activation energy E_a is equal to

The rate of the heterogenous catalytic reaction A(g) + B(g) → C(g) is given by $$ - {{\text{r}}_{\text{A}}} = \frac{{{\text{k}}.{{\text{K}}_{\text{A}}}.{{\text{p}}_{\text{A}}}.{{\text{P}}_{\text{B}}}}}{{1 + {{\text{K}}_{\text{A}}}.{{\text{P}}_{\text{A}}} + {{\text{K}}_{\text{C}}}.{{\text{p}}_{\text{C}}}}},$$      where K_A and K_C are the adsorption equilibrium constants. The rate controlling step for this reaction is

The catalytic converter for conversion of SO₂ to SO₃ by contact process should have a feed with SO₂ content between