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  1. The base of an electric iron is brightly polished mainly

  2. A.

     To make it smooth and frictionless

    B.

     To make it rust-proof

    C.

     To reduce heat loss by radiation

    D.

     To make it more durable

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    Answer : Option C

    Explanation :

    Polished surfaces are poor radiators of heat. So loss of heat on that account is reduced and the electric iron remains hotter than otherwise.


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