The toxicity of which of the following heavy metals leads to Liver cirrhosis?A. Copper
B. Lead
C. Mercury
D. Zinc
B. Lead
C. Mercury
D. Zinc
Month: February 2019
The cooling effect in a cooling tower can be speeded up by _______________________?
The cooling effect in a cooling tower can be speeded up by _______________________?
A. Increasing the air velocity and area of exposed wet surface
B. Reducing the barometric pressure
C. Reducing the humidity of the air
D. All A., B. and C.
To remove all the moisture from a wet solid it requires exposure to _____________ air?
To remove all the moisture from a wet solid it requires exposure to _____________ air?
A. Perfectly dry
B. Highly humid
C. High temperature
D. None of these
Pore size of the molecular sieve 5A is ____________________ mm ?
Pore size of the molecular sieve 5A is ____________________ mm ?
A. 5
B. 0.5
C. 0.05
D. 50
For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG: mass transfer co-efficient, moles/m2, a: interfacial area per unit volume of tower) ?
For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG: mass transfer co-efficient, moles/m2, a: interfacial area per unit volume of tower) ?
A. G/(FG . a)
B. FG/(G . a)
C. (G . a)/FG
D. L/(FG . G)
Perforated plate towers are unique for solvent extraction because, they provide_____________________?
Perforated plate towers are unique for solvent extraction because, they provide_____________________?
A. Higher contact area
B. Better contact of the phase
C. Repeated coalescence & redispersion of the drop phase
D. None of these
The equation, NA = (DAB . Pt /RTZ . PBM) (PA1 – PA2) is for_______________________?
The equation, NA = (DAB . Pt /RTZ . PBM) (PA1 – PA2) is for_______________________?
A. Fick’s second law of diffusion
B. Steady state diffusion for stagnant case
C. Liquid M.T.C. by Higbie penetration theory
D. None of these
For the same system, if the same liquid used in an absorber is decreased, the tower height will__________________?
For the same system, if the same liquid used in an absorber is decreased, the tower height will__________________?
A. Increase
B. Decrease
C. Remain unaffected
D. Decrease or increase; depends on the type of liquid
The commonly used solvent in supercritical extraction is_____________________?
The commonly used solvent in supercritical extraction is_____________________?
A. Methyl ethyl ketone
B. Water
C. Carbon tetrachloride
D. Carbon dioxide
Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature) ?
Cox chart, which is useful in the design of distillation column particularly for petroleum hydrocarbons, is a plot of (where, P = vapor pressure, T = temperature) ?
A. log P vs. T
B. log P vs. log T
C. T vs. P
D. P vs. log T