The reaction CH2 = CH2 + Br2 ?? CH2 Br ?CH2Br is
A.a substitution reaction
B.an addition reaction
C.a molecular rearrangement
D.a photochemical reaction
Category: Chemical Reaction Engineering Mcqs
For perfect mixed flow the dispersion number must be
A.zero
B.less than 2100
C.less than 2
D.infinity
Ionic reactions proceed in
A.solid state only
B.liquid state only
C.any state
D.solution
For identical feed composition, flow rate, conversion and for all positive reaction orders, the ratio of volumes of the mixed reactor to the plug flow reactor is
A.always one
B.always less than one
C.always greater than one
D.equal to the order of reaction.
When a correctly written chemical equation is balanced
A.the number of atoms of each kind on each side should be equal
B.all molecules are diatomic
C.all substances are in the same physical state
D.the sum of the coefficient on both sides is the same
If a solid-gas non-catalytic reaction occurs at very high temperature, the rate controlling step is
A.film diffusion
B.chemical reaction
C.ash layer diffusion
D.pore diffusion.
Suppose doubling the concentration of a reactant increases the rate of reaction by a facator of 4, and tripling the concentration of the reactant increases the reaction rate by a factor of 9. Then the rate of reaction is proportional to the concentration of the reactant raised to the
A.first power
B.second power
C.third power
D.fourth power.
