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A substance X, which is an oxide of a gr...

A substance X, which is an oxide of a group 2 element, is used intensively in the cement industry. This element is present in bones also. On treatment with water it forms a solution which turns red litmus blue. Identify X and also write the chemical reactions involved.

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X is calcium oxide (CaO), also called quick lime. It reacts withh water to form calcium hydroxide which is a basic compound.
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A substance X which is an oxide of a metal is used intensively in the cement industry. This element is present in bones also. On treatment with water it forms a solution which turns red litmus blue. Identify X and also write the chemical reactions involved.

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Knowledge Check

  • An element X forms an oxide XO which turns red litmus blue. Identify X.

    A
    A metal
    B
    A non-metal
    C
    A metalloid
    D
    A noble gas

  • Each of the following oxide dissolves in water to give an aqueous solution which turns red litmus blue except

    A
    MgO
    B
    CaO
    C
    `CO_(2)`
    D
    `Na_(2)O`

  • Which of the following oxides when dissolved in water gives a solution which turns blue litmus red?

    A
    `MgO`
    B
    `CaO`
    C
    `CO_2`
    D
    `CuO`

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