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  1. The substance that is added to make natural rubber strong and more bouncy is

    2. A.

     Polythene
    B.

     Sponge
    C.

     Sulphur
    D.

     Chlorine

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    Answer : Option C

    Explanation :

    In order to give more strength and more elasticity, natural rubber is heated with sulphur or sulphur compounds at 150°C temperature. Vulcanized rubber has good tensile strength.

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