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Discussion :: Lithosphere

  1. Igneous rocks are said to be acidic when they contain high proportion of ________

    2. A.

     Iron
    B.

     Magnesium
    C.

     Silica
    D.

     Aluminium

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    Answer : Option C

    Explanation :

    When Igneous rocks contain high proportion of silica, they are acidic. Acid igneous rocks such as granite are less dense and have lighter colour than basic igneous rocks.

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