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7th Class Science Physical and Chemical Changes Question Bank Physical and Chemical Changes

  • question_answer
    Complete the following equation of rusting of iron. \[\text{Iron(Fe)+A+moisture}\to \text{B}\]

    A) A = Oxygen, B = Carbon dioxide

    B) A = Water, B = Oxygen

    C) A = Oxygen, B = Rust (iron oxide)

    D) A = Carbon dioxide, B = Oxygen

    Correct Answer: C

    Solution :

    Iron (Fe) + Oxygen (\[{{\text{O}}_{\text{2}}}\]) + moisture \[\left( {{\text{H}}_{\text{2}}}\text{O} \right)\] \[\xrightarrow{{}}\]Rust (iron oxide)


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