10th Class Science Metals and Non-metals Question Bank 10th CBSE Science Metals and Non-metals

  • question_answer   Aqueous solutions of zinc sulphate and iron sulphate were taken in test tubes I and II by four students A, B, C and D. Metal pieces of iron and zinc were dropped in the two solutions and observations made after several hours were recorded in the form of table as given below.
    Student Metal Solution Colour change of solution Deposit/coating  obtained
    A Fe Turned green Silvery grey deposit
      Zn No change No change
    B Fe No change Black deposit
      Zn Colour faded Grey coating
    C Fe No change No change
      Zn Turned colourless Black deposit
    D Fe No change Grey deposit
      Zn No change Black deposit
    Which student has given the correct report?


                      Student C (a) Fe is less reactive than zinc. So No reaction (b) Zn is more reactive than Fe, so it displaces iron as follows

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