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Which of the following is used for remov...

Which of the following is used for removing permanent hardness of water?

A

Baking soda

B

Washing soda

C

Alum

D

Quick lime

Text Solution

Verified by Experts

The correct Answer is:
B
Washing soda can be used for removing permanent hardness by precipitation reaction.
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Knowledge Check

  • Which of the following is responsible for the permanent hardness of water?

    A
    Calcium bicarbonate
    B
    Sodium chloride
    C
    Magnesium bicarbonate
    D
    Calcium sulphate

  • Which of the following methods is not used to remove permanent hardness of water?

    A
    by mixing sodium carbonate
    B
    by distillation
    C
    by mixing caustic soda
    D
    by boiling

  • Which of the following substances cause permanent hardness of water

    A
    `CaCl_(2)`
    B
    `Ca(HCO_(3))_(2)`
    C
    `CaCO_(3)`
    D
    All of these

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    Hard water contains dissolved salts such as magnesium and calcium chlorides, bicarbonates, or sulphates. There are two kinds of hardness of water, i.e. temporary hardness and permanent hardness. When Graham's salt (calgon) is used for removal of permanent hardness of water, Ca^(2+) and Mg^(2+) are sequestered in the form of

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