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  1. The litmus paper utilized in the chemical laboratories is made of :

    2. A.

     Fern
    B.

     Algae
    C.

     Lichen
    D.

     Fungi

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    Answer : Option C

    Explanation :

    Litmus paper is an acid/base indicator that changes color to identify bases and acids. Litmus is a dye made from naturally occurring substances, including lichens (fungi)– the most commonly used of which is the species roccella tinctoria.

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