Multiple choice

Which of the following elements do not show variable valencies?

  1. Scandium
  2. Chromium
  3. Manganese
  4. Copper
  5. Zinc Select the correct answer using codes given below:

  1. 1 and 3

  2. 1 and 5

  3. 2 and 4

  4. 3 and 5

  5. 4 and 5
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Scandium (Z = 21) and zinc (Z = 30) do not exhibit variable oxidation states. Scandium shows only +3 oxidation state in its compounds. Zinc shows only +2 oxidation state in its compounds.

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