7th Class Science Sample Paper Science Sample Paper - 9

  • question_answer
    Choose the correct option:
    (ii) What is the formula of rust?

    A) \[F{{e}_{3}}{{O}_{4}}\]          

    B)                    \[F{{e}_{2}}{{O}_{3}}\]     

    C) \[FeO\]             

    D)                    None of these

    Correct Answer: B

    Solution :

    Not Available   


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