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Characterisation Techniques for Raw Materials Questions and Answers

31.

State whether the following is true or false.
Mineralogical and chemical analysis of a clay give the same information in different units.

Answer: C

Chemical analysis reports oxides and mineralogical analysis reports the minerals those oxides are combined into. Two clays with identical oxide analyses can contain quite different minerals and behave very differently.

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32.

Assertion (A): Two clays with identical chemical analyses can behave quite differently in a body.
Reason (R): The same oxides can be combined into different minerals with different properties.

Answer: D

Both are true and the reason gives the cause: an oxide analysis is blind to mineralogy, so kaolinite and a mixture of gibbsite with quartz might report the same figures while behaving nothing alike in forming or firing.

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