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Anhydrous BaO(2) is not used for prepari...

Anhydrous `BaO_(2)` is not used for preparing `H_(2)O_(2)` . Why ?

Text Solution

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Anhydrous `BaO_(2)` is not used because the `BaSO_(4)` formed during the reaction forms a protective layer around unreacted `BaO_(2)` and the reaction stops some time.
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For preparing H_(2)O_(2) in the laboratory

H_(2)O_(2) is used as :

Knowledge Check

  • Statement-1 : Anhydrous BaO_(2) is not used for preparing H_(2)O_(2) . Statement-2 : H_(2)O_(2) is prepared on large scale by air oxidation of 2 -Ethyl anthraquinol.

    A
    Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-12
    B
    Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-13
    C
    Statement-1 is True, Statement-2 is False.
    D
    Statement-1 is False, Statement-2 is True.

  • Assertion: Anhydrous BaO_(2) is used for preparing H_(2)O_(2) . Reason : Hydrated BaO_(2) is not available.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion
    B
    If both assertion and reason are true but reason is nto the correct exaplation of the assertion
    C
    If assertion is true but reason is false
    D
    If the assertion and reason both are false

  • For preparing H_(2)O_(2) in the laboratory

    A
    `PbO_(2)` is added to acidified solution of `KMnO_(4)`
    B
    `BaO_(2)` is added to `CO_(2)` bubbling through cold water
    C
    `MnO_(2)` is added to dilute cold `H_(2)SO_(4)`
    D
    `Na_(2)O_(2)` is added to boiling water

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    H_(2)O_(2) is used as :

    H_(2)O_(2) is used as :

    Unhydrous BaO_2 cannot be used in the preparation of H_2O_2 because

    Anhydrous MgCl_(2) can be prepared by :

    Hydrogen peroxide can be prepared in the laboratory by the action of dilute acids on metallic peroxide. In one method, sodium peroxide is added in samall amount at a time to a dilute solution of sulphuric acid in cold. Sodium peroxide can be replaced by barium peroxide. In this case, a paste of BaO_(2).8H_(2)O is prepared and added gradually to an ice-cold dilute sulphuric acid. Barium sulphate precipitates out leaving behind a dilute solution of hydrogen peroxide. Phosphoric acid can also be used in place of sulphuric acid. Which of the following is used for the preparation of H_(2)O_(2) ?

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