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.
Category: Chemical Engineering Mcqs
Nuclear energy is due to conversion of
A.light into heat
B.mass into energy
C.protons into neutrons
D.helium into hydrogen
The Lewis number is the ratio of
A.thermal diffusivity to mass diffusivity
B.mass diffusivity to thermal diffusivity
C.mass diffusivity to momentum diffusivity
D.momentum diffusivity to thermal diffusivity
Thermocouple in a well behaves as a true
A.first-order system
B.multiple first-order system
C.underdamped second-order system
D.overdamped second-order system
Red phosphorus is chemically unreactive because
A.it does not contain P-P bonds
B.it does not contain tetrahedral P4 molecules
C.it does not catch fire in air even upto 200?C
D.it has a polymeric structure
During radioactive decay Beta particles are ejected from
A.nucleus
B.outer nuclear region
C.outermost shell
D.innermost shell
The unit of energy is
A.J/s
B.J
C.W
D.N
In a shell and tube heat exchanger, the corrosive liquid is normally passed through
A.Shell side
B.Tube side
C.Either of (A) and (B) above
D.None of the above
For any particular dust concentration in the feed stream to a fabric filter increasing the gas-to-fabric ratio will
A.result in an increased pressure drop
B.result in decreased pressure drop
C.not affect the pressure drop
The diffusivity of a constituent A in solution B has the units.
A.m/s
B.m2/s
C.m3/s
D.kmol/(m2-s)
