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Plaster of Paris is hardened by:...

Plaster of Paris is hardened by:

A

Combining with water

B

Due to formation of gypsum

C

Due to formation of slaked lime

D

Both (a) and (b)

Text Solution

Verified by Experts

The correct Answer is:
D
Plaster of Paris is hardened by combining with water. On mixing with water it changes to gypsum giving a hard solid mass.
`CaCO_(2)(1)/(2) H_(2)O + 1(1)/(2)H_(2)O rarr CaSO_(4).2H_(2)O`
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Plaster of Paris is obtained by heating ______

Identify the correct statement - (A) Gypsum contains a lower percentage of calcium than Plaster of Paris (B) Gypsum is obtained by heating Plaster of Paris (C) Plaster of Paris is obtained by hydration of gypsum (D) Plaster of Paris is obtained by partial oxidation of gypsum

Knowledge Check

  • Plaster of Paris is harden by

    A
    giving off `CO_2`
    B
    changing into `CaCO_3`
    C
    uniting with water
    D
    giving out water

  • Plaster of Paris is used

    A
    as a plaster for walls
    B
    in densitry and surgery
    C
    in metallurgical process
    D
    as a drying agent

  • Plaster of Paris hardens by

    A
    giving off `CO_(2)`
    B
    changing into `CaCO_(3)`
    C
    combining with water
    D
    giving out water .

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