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  1. A level of atmosphere which is composed partly of Electrons and Positive Ions is called

    2. A.

     Troposphere
    B.

     Ionosphere
    C.

     Stratosphere
    D.

     Mesosphere

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    Answer : Option B

    Explanation :

    The layer of atmosphere composed of ionic gaseous molecules helping in propagation of radio waves is Ionosphere. It is the 2nd layer from the top. It ranges from 60km. to 1000km. It also protects Earth from meteorites.

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