Question

Why a thick layer of Plaster of Paris is applied over the bandage to keep the fractured bone immobilized?

Answer 1

Answer:

Hey mate, here is your answer

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When water is added to Plaster of Paris, it sets into a hard mass thus it keeps the fractured bone on its place and prevents it from moving while it heals.

Explanation:

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Answer 2

Answer:

This is because while applying thick layer of Plaster of Paris then water is added into it and reverse rection take place. So Plaster of Paris has a thick layer