Alcohol is dehydrated using ______________ distillation?
A. Extractive
B. Azeotropic
C. Steam
D. Molecular
Month: February 2019
When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is _______________ distillation?
When the mixture to be distilled has a very high boiling point and the product material is heat sensitive, the separation technique to be used is _______________ distillation?
A. Continuous
B. Steam
C. Azeotropic
D. None of these
Mechanism of moisture removal in case of freeze drying of food stuff is by ___________________?
Mechanism of moisture removal in case of freeze drying of food stuff is by ___________________?
A. Evaporation
B. Sublimation
C. Dehydration
D. Adsorption
Molality is defined as the number of gm moles of solute per _________________ of solvent ?
Molality is defined as the number of gm moles of solute per _________________ of solvent ?
A. Litre
B. gm
C. Kg
D. m3
Flash distillation is _______________________?
Flash distillation is _______________________?
A. Same as differential distillation
B. Used for multi-component systems like crude refining
C. Same as simple distillation
D. Most useful for handling binary systems
When an unsaturated air-water mixture is heated at constant pressure, then ____________________ ?
When an unsaturated air-water mixture is heated at constant pressure, then ____________________ ?
A. The partial pressure of water vapour increases
B. The specific humidity decreases
C. The relative humidity increases
D. The relative humidity decreases
Danckwerts developed the ____________________ theory?
Danckwerts developed the ____________________ theory?
A. Penetration
B. Surface renewal
C. Film
D. None of these
Leaching of coarse solid lumps is also termed as _____________________?
Leaching of coarse solid lumps is also termed as _____________________?
A. Decoction
B. Dissolution
C. Percolation
D. Agitation and settling
Steam distillation is used to__________________?
Steam distillation is used to__________________?
A. Reduce the number of plates
B. Avoid thermal decomposition of a component
C. Increase the efficiency of separation
D. Increase the total pressure of distillation
Which of the following can be calculated theoretically using steam table and Dalton’s law of partial pressure; if the relative humidity and dry bulb temperature of moist air is known ?
Which of the following can be calculated theoretically using steam table and Dalton’s law of partial pressure; if the relative humidity and dry bulb temperature of moist air is known ?
A. Dew point
B. Humidity ratio
C. Wet bulb temperature
D. None of these