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     EduGorilla 
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    When hard water is evaporated completely, the white solid remains in the container. It may be due to the presence of

    1. carbonates of Ca and Mg
    2. sulphates of Ca and Mg
    3. chlorides of Ca and Mg

    Select the correct answer using the code given below:

    Options :-

    1. 1 and 2 only
    2. 1, 2 and 3
    3. 3 only
    4. 1 and 3 only
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