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Assertion (A) Permanent hardness of w...

Assertion (A) Permanent hardness of water is removed by treatment with washing soda.
Reson (R) Washing soda reacts with soluble magnesium and calcium sulphate to from insolube carbonates.

Text Solution

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The correct Answer is:
A
Statements of assertion and reason both and reason is the correct explanation of assertion.
`Na_(2)CO_(3)+underset(CsSO_(4)" (from hard water)")underset("or")(MgSO_(4) to Na_(2)SO_(4)) + underset(CaCO_(3)"(insoluble)")underset("or")(MgCO_(3))`
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Explore conceptually related problems

In the following quesitons a statement of Assertion (A) followed by a statement of reason (R ) is given. Choose the correct option out of the option given below each question. Assertion[A]: Permanent hardness of water is removed by treatment with washin soda. Reason[R]: Washing soda reacts with soluble magneisum and calcium sulphate to form insoluble carbonates.

Assertion: Permanent hardness of water can be removed by treatement with washing soda. Reason: Washing soda reacts with calcium and magnesium sulphates and chlorides to form insoluble carbonates.

Consider the following statements. l. Permanent hardness of water is removed by treatment with washing soda. ll. Platinum and palladium can adsorb large volumes of hydrogen. Ill. Washing soda reacts with soluble magnesium and calcium sulphate to form insoluble carbonates. Choose the correct statement(s).

A : Permanent hardness of water is due to the presence of chlorine or sulphates of Ca or Mg. R : Permanent hardness is removed by boiling

Assertion (A) : Temporary hardness in water is due to the presence of chlorides of magnesium. Reason (R) :Temporary hardness is removed by Clark's method.

Knowledge Check

  • Assertion: Permanent hardness of water can be removed by treatement with washing soda. Reason: Washing soda reacts with calcium and magnesium sulphates and chlorides to form insoluble carbonates.

    A
    Assertion and reason both are correct statements and reason is correct explanation for assertion.
    B
    Assertion and reason both are correct statements but reason is not correct explanation for assertion.
    C
    Assertion is correct statement but reason wrong statement.
    D
    Assertion is wrong statement but reason is correct statement.

  • Assertion : Permanent hardness of water can be removed by using washing soda. Reason : Washing soda reacts with soluble calcium and magnesium chlorides and sulphates in hard water to form insoluble carbonates.

    A
    If both assertion and reason are true and reason is the correct explanation of assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • Assertion (A): If excess of carbon is passed through lime water, it becomes transparent. Reason ( R): Calcium cicarbonate is soluble in water.

    A
    Both (A) and ( R) are ture and ( R) is the correct explanation for (A).
    B
    Both (A) and ( R) are true ( R) is not the correct explanation for (A).
    C
    (A) is true but ( R) is false.
    D
    (A) is false but (R ) is trues.