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

  • question_answer
      Aluminium sulphate and copper sulphate solutions were taken in two test tubes I and II, respectively. A few pieces of iron filings were then added to both the solutions. The four students A, B, C and D recorded their observations in the form of a table as given below.
    StudentSolution (I) Solution (II)
    A Colourless solution Light green Blue colour is retained
    B Colourless solution No change Blue colour solution Green
    C Colourless solution Light blue Blue colour solution Green
    D No change in colour Blue colour of solution fades
    Which student has recorded the correct observation?         

    Answer:

                      Student B Iron does not react with solution because iron is less reactive than aluminium. But Fe being more reactive than Cu displaces Cu from solution.


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