WBCS.LIVE practice question

When an iron nail is dipped into a _________ coloured copper sulphate solution, its colour changes to ________ .

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. blue, green
  2. green, blue
  3. blue, yellow
  4. yellow, blue

Correct answer and explanation

Correct answer: blue, green