Category: Chemical Reaction

A. For the same conversion, the holding time required in a batch reactor, is always equal to the space time required in a PFR
B. Two mixed reactors of unequal size are available for producing a specified product, formed by
a homogenous second order reaction. To achieve maximum production rate, the smaller
reactor should be placed in series before the larger reactor
C. Arrhenius equation describing the effect of temperature on rate constant is given by,
K = A.e-Ea/RT
D. The mechanism for the decomposition of CH3CHO into CH4 and CO in presence of I2 is:
CH3CHO + I2 → CH3I + HI + CO; slow
CH3I + HI → CH4 + I2; fast
Then the rate of disappearance of CH3CHO is equal to K.CCH3I.CHI and acts as a catalyst

A. More uniform operating conditions
B. Permits operation at the optimum temperature for a long reaction time
C. Higher overall selectivity for a first order consecutive reaction
D. All A., B. and C.

A. The composition of reactants remains constant along a flow path
B. The conversion of the reactant varies from point to point along a flow path
C. There is no lateral mixing of fluid
D. There may be diffusion along the flow path

A. Reversible exothermic
B. Irreversible exothermic
C. Irreversible endothermic
D. Reversible endothermic

A. In catalytic reactions, the catalyst reacts with the reactants
B. A catalyst initiates a chemical reaction
C. A catalyst lowers the activation energy of the reacting molecules
D. A catalyst cannot be recovered chemically unchanged at the end of the chemical reaction

A. k ∝ e-E/RT
B. k ∝ T.eE/RT
C. k ∝ √T
D. k ∝ T1.5

A. Multiple proportion
B. Conservation of mass
C. Constant proportion
D. None of these

A. Increases
B. Decreases
C. Remain constant
D. Unpredictable

A. A highly exothermic reaction is to be controlled
B. Undesirable side reaction (at high concentration of one of the reactants) is to be avoided
C. A gas is to be reacted with liquid (e.g. hydrogenation of fat)
D. All A., B., and C.

A. Is always equal to
B. Is always greater than
C. Is always less than
D. May be greater or less than