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A doctor sets a fractured arm with a white powder that hardens with water. It is:
APowder of Perlite
BPlaster of Pumice
CPowder of Pyrite
DPlaster of Paris
Answer & Solution
Correct answer: D. Plaster of Paris
1. Gypsum heated at 373 K loses part of its water.
2. The powder formed sets hard when mixed with water again.
3. That powder is Plaster of Paris.
_Source: syllabus Science Class X, Chapter 2, Acids, Bases and Salts._
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