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  1. A good brick earth should contain :

    2. A.

    about 20% to 30% of alumina
    B.

    about 50% to 60% of silica
    C.

    not more than 5% of lime
    D.

    about 5 to 6% of oxide of lime
    E.

    All the above.

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    Answer : Option E

    Explanation :

    No answer description available for this question

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