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Plaster of paris is...

Plaster of paris is

A

`CaSO_(4)2.H_(2)O`

B

`CaSO_(4).3H_(2)O`

C

`CaSO_(4).H_(2)O`

D

`CaSO_(4).1/2H_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
D
`CaSO_(4).1/2H_(2)O` or `(CaSO_(4))_(2).H_(2)O`
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Plaster of paris on losing water and gaining water gives A and b . Identify A and B .

(a). What is plaster of paris? Write the chemical formula of plaster of paris. (b) How is plaster of paris prepared? Write chemical equation of the reaction involved. (c) Explain why plaster of paris should be stored in a moisture-proof container. (d) State two important uses of plaster of paris.

Knowledge Check

  • Plaster of Paries is obtained

    A
    by adding water to calcium sulphate
    B
    by adding sulphuric acid to calcium hydroxide
    C
    by heating gypsum to a very high temperature
    D
    by heating gypsum to `100^(@)C` .

  • Setting of plaster of paris involves:

    A
    The oxidation with atmosphere oxygen.
    B
    The removal of water to from anhydrous calcium sulphate
    C
    The hydration to form the orthorhombic ions of gas sum.
    D
    The reaction wit atmospheric carbon dioxide gas

  • Setting of plaster of paris involves:

    A
    The oxidation with atmosphere oxygen.
    B
    The removal of water to from anhydrous calcium sulphate
    C
    The hydration to form the orthorhombic ions of gas sum.
    D
    The reaction wit atmospheric carbon dioxide gas

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    What is the formulae of (i) Plaster of Paris (ii) Gypsum ?

    Why is plaster of paris stored in a moistureproof vessel ?

    Plaster of Paris should be stored in a moisture-proof container. Explain why ?

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