RECITATION ON SUSPENSIONS AND EMULSIONS

For an ideal suspension, the sedimentation volume should be ____.

• Less than one

• More than one

• Equal to one

• Zero

The rate of sedimentation is generally high in _____.

• Flocculated suspension

• Deflocculated suspension

• Both Flocculated and Deflocculated suspension

• Neither Flocculated nor Deflocculated suspension

An emulsion consists of _________.

• Two liquids

• Two solids

• One liquid and one gas

• One liquid and one solid

The purpose of an emulsifier is to __________.

• Reduce the interfacial tension between immiscible phase

• Decrease surface are in a suspension

• Minimize the size of globules

• Improve medication taste

_____ is a procedure when oil is triturated with the gum before adding in water for preparing a primary emulsion.

• Continental method

• Wet method

• Auxiliary method

• Forbes bottle method

Which of the following is NOT used as an emulsifying agent?

• Electrolyte

• Finely divided solids

• Hydrophilic colloid

• Surfactant

In Conductivity Test, if bulb glows on passing electric current, this means that the emulsion is ________.

• o/w

• w/o

• Microemulsion

• Multiple emulsion

Which of the following is NOT a method to identify the type of emulsion?

• Coagulation method

• Conductance method

• Miscibility method

• Dye solubility method

In precipitation method of preparing suspensions, particle size control is important. For suspensions intended for parenteral and inhalation us, the ideal particle size range is _______.

• 1 to 5 microns

• 1 micron and below

• 5-8 microns

• 8-10 microns

This equipment produces finely divided particles by spraying a mist of liquid through a heated chamber, drying immediately and collecting the dried powders in a clean receptacle;

• Spray drying

• Freeze drying

• Micronization

• Homogenization