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NTA Abhyas JEE Main2020Chemistryd and f Block ElementsPractice

Chloride of which of the following element is coloured?

Options

  1. AA g
  2. BH g
  3. CZ n
  4. DC o

Correct answer

D. C o

Step-by-step solution

Atomic number of Ag, Hg, Zn and Co is 47, 80, 30 and 27 respectively. Write the electronic configuration of each and see if there are any unpaired electrons. In C o C l 3 - C o + 3 - [Ar]3 d 6 4 s 0 4 unpaired electrons. So, it will be coloured.

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