Question

The sum of the total number of bonds between chromium and oxygen atoms in chromate and dichromate ions is ____________.

Answer 1

Answer is 12

Answer 2

Total number of bonds between chromium and oxygen in both structures are 18.

Note :- But answer of NTA is 12. They consider only linkages between Chromium and Oxygen but in question total no. of bonds are asked so σ and π bonds must be considered separately.