10th Class Science Solved Paper - Science-2015 Set-II

  • question_answer
    Four test tube smarked I, II, III and IV were taken 20 ml of \[\mathbf{A}{{\mathbf{l}}_{\mathbf{2}}}{{\mathbf{(S}{{\mathbf{O}}_{\mathbf{4}}}\mathbf{)}}_{\mathbf{3}}}\] solution in water was poured in each of the test tubes. A piece of zinc metal was placed in test tube I, an iron nail was put in test tube II, copper turnings were put in test tube III ­and a clean aluminium strip was placed was placed in test tube IV. No change was observed in any of the test tubes. The correct inference drawn is:
    (a) Copper is more reactive than Aluminium.
    (b) Zinc is more reactive than Aluminium.
    (c) Zinc is more reactive than Copper.
    (d) Zinc, Iron and Copper are less reactive than Aluminium.

    Answer:

    (d) Zinc, Iron and Copper are less reactive than Aluminium.


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