Question

Assertion : Plaster of paris is used by doctor for supporting fractured bones. Reason : when plaster of paris is mixed with water and applied around the fractured limbs it sets into a hard mass.​

Answer 1

Answer:

Both A&R is true and R is the correct explanation of A

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Answer 2

The correct answer is : (a) Both assertion and reason are true and reason is the correct explanation of assertion.

• Plaster of paris is gypsum, whose formula is $CaSO_{4}.\frac{1}{2} H_{2}O$.
• Plaster of paris is mixed with water and applied to the area of the limb which is fractured. Within a few minutes, it sets into a hard mass around the fractured limbs.
• As it hardens, the limb area is immobilized which can facilitate undisturbed healing.
• Thus, both assertion and reason are correct. Also, plaster of paris is used by doctors for supporting fractured bones because it sets into a hard mass around the fractured limbs to provide undisturbed healing.
• Thus, the reason is the correct explanation of assertion.