Q151. What is the oxidation number of a chromium (Cr) atom in potassium dichromate (K2Cr2O7) and potassium chromate (K2CrO4)?Chemistry — NUST Mock By Dogers 6 — Question 151 of 200A. +6B. +3C. +7D. +12Practice more Chemistry MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →