BTF1133 Chapter 6

Select equipment used for the evaporation process.

• Fluidized bed dryer

• Vacuum oven

• Rotary evaporator

• Distillation column

Select the purpose of the evaporation.

• to remove excess moisture

• To concentrate a solution

• To seperate a solution

Following are the factors that can enhance the rate of evaporation EXCEPT

• Temperature

• Humidity

• Surface area

• None of the answer

Select the principle of separation using distillation.

• Solubility

• Bioavailability

• Volatility

• Density

Define partial pressure.

• Pressure that a single component of a mixture of gases would exert if it occupied the entire volume by itself at the same temperature

• Pressure exerted by a vapour in equilibrium with its liquid (or solid) phase at a given temperature.

• Pressure exerted by a mixture of gases at a given temperature

Choose the correct formula to calculate the partial pressure of a component.

• (Vapour pressure of a pure component) x (mole fraction of the component in liquid)

• (Total pressure of the mixture) x (mole fraction of the component in liquid)

• Summation of the partial pressure

Choose the correct statement.

• Bubble point temperature is a temperature where the first liquid is formed

• Bubble point temperature is a temperature where the first vapour is formed

• Dew point temperature is a temperature where the first vapour is formed

The Henry's law is applicable for

• Liquid mixture at a lower concentration

• Gas mixture at a lower concentration

• Liquid mixture at a higher concentration

• Gas mixture at a higher concentration

Choose parts of distillation unit. May choose more than one answer.

• Reboiler

• Vertical shell

• Condenser

• Reflux

Choose the types of tray that can be used in a distillation unit. May choose more than one answer.

• Packed column

• Valve tray

• Sieve tray

• Bubble cap tray