CHEMICAL REACTION ENGINEERING QUIZ

Increase the activity of a catalyst

Have very high selectivity

Inhibit catalyst poisoning

Provide large surface area with a small amount of active material

It is an exothermic reaction

The energy of reacting molecules exceeds the activation energy by absorption of light

It is a reversible reaction

None of these

60

90

100

75

Initial concentration of the reactants remains constant

Free energy of activation is lower

Entropy changes

Free energy of activation is higher

Neither A nor B

Presence of two mobile phases

Lack of intraparticle diffusion resistance

Both A and B

1

3

2

0.5

τ and θ are always equal

τ = θ , for a non-isothermal reactor

τ = θ , for an isothermic tubular reactor in which the density of the process fluid is constant

τ = θ , when the fluid density changes in the reactor

Be more in PFR than in CSTR

Be same in both cases

Depend on the temperature

Be more in CSTR than in PFR

The composition of reactants remains constant along a flow path

There is no lateral mixing of fluid

There may be diffusion along the flow path

The conversion of the reactant varies from point to point along a flow path

CO₂

H₂

N₂

He