A:-infinite trays and maximum reboiler heat load
B:-minimum trays and minimum reboiler heat load
C:-infinite trays and minimum reboiler heat load
D:-minimum trays and maximum reboiler heat load
Correct Answer:- Option-A
Question56:-The absorption factor is defined as
A:-mG/L.
B:-mL/G
C:-LimG
D:-LG/m
Correct Answer:- Option-C
Question57:-Mass transfer coefficient, k according to penetration theory various with mass diffusivity 85
A:D*(0.5)°
B:-D
C:-1/D
D:-D*(1.5)*
Correct Answer:- Option-A
Question58:-Size reduction of coarse hard solids using a crusher is accomplished by
A:-Attrition
B:-Compression
C:-Cutting
D:-Impact.
Correct Answer:- Option-B
Question59:-Sticky materials are transported by
A:-Apron conveyor
B:-Screw conveyor
C:-Belt conveyor
D:-Hydraulic conveyor
Correct Answer:- Option-B
Question60:-A filtration is conducted at constant pressure to recover solids from dilute slurry. To reduce the time of filtration,

the solids concentration in the feed slurry is increased by evaporating half the solvent. If the resistance of the filter medium
is negligible, the filtration time will be reduced by a factor of

ا
2-:8
‎C:-4‏
‎D:-8‏
‎Correct Answer:- Option-C‏

Question61:-The gas phase reaction 2 A ‘->° B is carries out in an isothermal plug flow reactor. The feed consists of 80
mole% A and 20 mole% inert. If the conversion of A at the reactor exit is 50% then “C_(A)//C_(Ao)° at the outlet of the
reactor is

A:-2/3
B:-5/8
C:-1/3
0-8
Correct Answer:- Option-B
Question62:-The reaction 2A + B *->* 2C occurs on a catalyst surface. The reactants A and B diffuse to the catalyst surface

and get converted completely to the product C, which diffuses back. The steady state molar fluxes of A, B and C are related
by

"20 (8) = 1௦:
-॥20_(8) = `-॥ (0)
`2॥ (8): = ` + (©)

ம: ಎ *-1//2N_(B)
Correct Answer:- Option-C
Question63:-Overall order of reaction for which rate constant has units of *(mol//L)*(-3//2) sec*(-1)° is
A:--3/2
B:-1/2
0:-3/2
D:-5/2
Correct Answer:- Option-D
Question64:-The rate constant of a reaction depends upon

۷6