The sum of the total number of bonds between chromium and oxygen atoms in chromate and dichromate ions is ________.
Correct option is A. 18
Total $$Cr-O$$ bonds in chromate $$4\sigma$$ and $$2 \pi$$ while in dichromate ion $$8\sigma$$ and $$4\pi$$ bonds.
Hence total $$Cr-O$$ bonds will be $$6+12=18$$