8th Class Science Chemical Effects of Electric Current Question Bank Chemical Effects of Electric Current

  • question_answer In the given figure, the filter paper contains starch soaked in potassium iodide solution is connected to the battery as shown. When we write on the wet paper, it has a blue black colour.
    (i)  Iodine is formed at the anode.
    (ii) Iodine turns blue black in the presence of starch.

    A)  Only (i) is correct.

    B)  Only (ii) is correct.

    C)  Both (i) and (ii) are correct.

    D)  Neither (i) nor (ii) is correct.

    Correct Answer: C

    Solution :

    Brown iodine turns blue black in the presence of starch. This shows that iodine is formed at the anode.

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