gs353867 gs353867

12-12-2022
Chemistry

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Q.) Oxidation number of P in PO4³, of S in SO4² and that of Cr in Cr₂O7² are respectively:
(a) +3, +6 and +5
(b) +5, +3 and +6
(c) +3, +6 and +6
(d) +5, +6 and +6

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