Question:

Setting of plaster of Paris is

Updated On: Jun 23, 2023
  • dehydration
  • oxidation with atmospheric oxygen
  • combination with atmospheric $CO_2$
  • hydration to yield another hydrate
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The Correct Option is D

Solution and Explanation

Setting of plaster of Paris is exothermic process $CaSO_4 \cdot \frac{1}{2}H_2O {->[H_2O] }\underset{\text{Orthorhombic}}{{CaSO_4 \cdot 2H_2O}} { ->[{\text{Heating}}] } \underset{\text{Gypsum}}{{CaSO_4 \cdot 2H_2O}}$
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Concepts Used:

Solutions

A solution is a homogeneous mixture of two or more components in which the particle size is smaller than 1 nm.

For example, salt and sugar is a good illustration of a solution. A solution can be categorized into several components.

Types of Solutions:

The solutions can be classified into three types:

  • Solid Solutions - In these solutions, the solvent is in a Solid-state.
  • Liquid Solutions- In these solutions, the solvent is in a Liquid state.
  • Gaseous Solutions - In these solutions, the solvent is in a Gaseous state.

On the basis of the amount of solute dissolved in a solvent, solutions are divided into the following types:

  1. Unsaturated Solution- A solution in which more solute can be dissolved without raising the temperature of the solution is known as an unsaturated solution.
  2. Saturated Solution- A solution in which no solute can be dissolved after reaching a certain amount of temperature is known as an unsaturated saturated solution.
  3. Supersaturated Solution- A solution that contains more solute than the maximum amount at a certain temperature is known as a supersaturated solution.