If R m is the minimum reflux ratio, the optimum reflux ratio may be ar – McqOptions

MCQOPTIONS

1.	If R m is the minimum reflux ratio, the optimum reflux ratio may be around __________ R m .
A.	1.2 to 1.5
B.	2.5 to 3
C.	3 to 4
D.	5
Answer» B. 2.5 to 3

Discussion

No Comment Found

Related MCQs

The McCabe ? L law states that the
Penetration theory states that the mass transfer co-coefficient is equal to (where, D e is diffusivity and ' t ' is time)
In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction x f = 0.2. The mixture splits into an extract phase E and a raf-finate phase R containing A at x B = 0.5 and x R = 0.05 respectively. The total mass of the extract phase is (in Kg)
At 750Â°K and 1 atm, the approximate value of Schmidt number for air is
Penetration theory relates the average mass transfer co-efficient ( K ) with diffusivity ( D ) as
Unsaturated air (with dry and wet bulb temperatures being 35 and 25Â°C respectively) is passed through water spray chamber maintained at 35Â°C. The air will be
A solid is being dried in the linear drying rate regime from moisture content X o to X F . The drying rate is zero at X = 0 and the critical moisture content is the same as the initial moisture X o . The drying time for M = ( L s / AR c ) is (where, L = total mass of dry solid, A = total surface area for drying R c = Constant maximum drying rate per unit area X = moisture content (in mass of water/mass of dry solids))
According to Chilton-Colburn analogy for mass transfer, N St . N Sc 2/3 is equal to
H 2 S present in naphtha reformed gas is removed by absorbing with
Mass transfer co-efficient ' K ' according to penetration theory varies with mass dif-fusivity as