BTF1133 Chapter 2

Select type of mixing in the pharmaceutical industry. (May select more than ONE answer.)

• Solid-liquid mixing

• Liquid-liquid mixing

• Solid-solid mixing

Ahmad is stirring a hot water to cool it down. Select the correct process.

• Mixing

• Agitation

How mixing plays an important role in the pharmaceutical industry?

• Improper mixing will cause microbial growth and reduce product stability

• Improper mixing will cause overdosing to patient and affect patient safety

• Improper mixing will cause difficulty in product handling

Mixing occurs when neither mixing nor demixing takes place unless the system is acted upon by a system of forces. Select the type of mixing.

• Positive mixing

• Negative mixing  

• Neutral mixing

• None of the answer

Which of the following is the positive mixing?

• Solid or liquid is mixed with a semisolid base

• Suspension of a solid in a liquid

• Two immiscible liquids are mixed

• None of the answer

Define diffusive mixing.

• The transfer of groups of adjacent particles from one location in the mass to another

• Rearrangment of one or a small number of particles

• When a layer of material moves/flows over another

Select factors that can cause segregation. (May select more than ONE answer.)

• Temperature

• Particle density

• Particle size

• Flow properties

The following is a dry mixer except:

• Shear mixer

• V-type mixer

• Double cone mixer

• 3D mixer

Choose a correct statement.

• Miscible liquids are the liquids that cannot mix together at any proportion

• Partially miscible liquids are the liquids which miscible in one another at one particular proportion

• Immiscible liquids are the liquids that can mix together at any proportion

Following are the liquid mixing devices EXCEPT:

• Propeller

• Turbine

• Baffle

• Paddle