Simple Pharmanotes

Definition Drying is defined as the removal of liquid from a product usually with application of heat. When a large amount of liquid is evaporated from a product with liquid consistency the process is called ‘evaporation’ . The final product is a concentrated liquid / slurry. When a very small amount of liquid is evaporated from solids the process is called ‘drying’ . The final product is a ‘dried solid’. It's a process of heat and mass transfer. Drying involves: Energy transfer from an external source to water or other liquid (Heat transfer).  Phase transformation of water/ other liquid from a liquid state to a vapour state and, Carry vapour generated away from the material under drying process and out of the dryer. DIFFERENCE BETWEEN EVAPORATION AND DRYING Drying Evaporation  Drying is mainly carried out on solid materials. Evaporation is mainly carried out on liquid materials. It involves removal of small amounts of water from solids. It involves removal of large amounts...

MCQs on Distillation. MCQs Distillation. Home MCQs on Evaporation MCQs Distillation. Test    Show all questions <=   => In Vacuum Distillation, Substance boils at a/an: ?   Exact temperature ?   temperature slightly above its boiling point ?   temperature below its boiling point ?   High Pressure In the fractionating column of fraction distillation, as we go higher in the column the…..? ?   Temperature becomes lower ?   Temperature becomes higher ?   minimum absorption occurs ?   Sublimation risk increases ____________ method of distillation is used for the purification & separation of chemicals of low vapor pressure, ?   Steam Distillation ?   Destructive distillation ?   Simple Distillation ?   Molecular Distillation Rectification is anothe...

MCQs on Evaporation.   MCQs Evaporation. Home MCQs on Heat Processes MCQs Evaporation. Test Show all questions <=   => Rate of evaporation is______: , ?   directly proportional to temperature of liquid ?   inversely proportional to temperature of liquid ?   independent of temperature of liquid ?   directly proportional to humidity of surrounding air Which of the following factors do not affect the rate of evaporation? ?   Temperature of liquid ?   Humidity of surrounding air ?   Depth of liquid ?   Surface of liquid Source of heat in most of the evaporator: ?   Coal ?   Steam ?   Hot Water ?   Hot Oil Hormones, antibiotics & enzymes are: ?   Heat-sensitive ?   Cold-sensitive ?   Volatile ?   None of these Greater...