Multiple choice

A teacher demonstrates the following experiment in the lab. Zinc pellets are added to a blue-coloured solution. When kept for some time, the blue colour vanishes and a colourless solution is formed in which a red mass is lying. The teacher tells the students that the colourless solution is zinc sulphate and the red mass is copper. What was the original blue-coloured solution?

  1. Copper sulphate

  2. Copper oxide

  3. Copper carbonate

  4. Zinc oxide

  5. Zinc carbonate
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A Correct answer
Explanation

The original blue-coloured solution was copper sulphate.

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