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Sodium chloride itself is not deliquesce...

Sodium chloride itself is not deliquescent, but it absorbs moisture when exposed to air. Why ?

Text Solution

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Sodium chloride is mixed with a small amount of magnesium chloride ` (MgCI_(2))` which absorbs moisture.
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Knowledge Check

  • At what relative humidity with Na_(2)SO_(4) be deliquescent (absorb moisture) when exposed to the air at 0^(@ )C ? Given Na_(2)SO_(4).10H_(2)O(s) hArr Na_(2)SO_(4)(s) +10H_(2)O(g), K_(p)=4.08xx10^(-25) and vapour pressure of water at 0^(@)C =4.58 Torr ?

    A
    below 60.5%
    B
    above 60.5%
    C
    above 39.5%
    D
    below 39.5%

  • Crystals of ferrous sulphate when exposed to air become

    A
    red
    B
    brown
    C
    colourless
    D
    black

  • Assertion (A): Sodium metal is stored under kerosene. Reason (R ): Metallic sodium melts when exposed to air.

    A
    Both A and R are true and R is the correct explanation of A.
    B
    Both A and R are true but R is NOT the correct explanation of A.
    C
    A is true but R is false.
    D
    A is false and R is true.