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Uses of Calcium Sulphate

Police crime ...

Question

Police crime detective makes an impression of the track of a motor vehicle tire on a mold made from:

A

quick-drying clay

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B

plaster of Paris

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C

lycopodium powder

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D

wax

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Solution

The correct option is D plaster of Paris
The mold made from plaster of paris can be conserved for a long time and thus crime detectives make use of it so that they get exact impression and can preserve it for future use.

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