SSC General Science & Technology Sample Paper NCERT Sample Paper-1

  • question_answer
    Iron articles rust because of the formation of

    A)  Ferrous chloride 

    B)  Sodium carbonate

    C)  A mixture of ferrous and ferric hydroxides

    D)  Ferric chloride

    Correct Answer: C

    Solution :

    [c] Rust is an iron oxide, usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. Rust consists of hydrated iron (III) oxides \[F{{e}_{2}}{{O}_{3}}^{.}n{{H}_{2}}O\] andiron (III) oxide-hydroxide (FeO(OH), \[Fe{{(OH)}_{3}})\].

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