Multiple choice

Which of the following aqueous ions are colourless?

  1. Sc3+(aq)
  2. Ti4+(aq)
  3. Zn2+(aq)
  4. Cd2+(aq) Select the correct answer using codes given below:

  1. 1 and 2

  2. 1, 2 and 3

  3. 1, 2, 3 and 4

  4. 2 and 3

  5. 2, 3 and 4
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sc3+(aq), Ti4+(aq), Zn2+(aq) and Cd2+(aq): All are colourless due to lack of unpaired electrons.

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