Oxidation number of Cr in CrO5 is same as of S in (a)H2SO5 (b)Na2S4O6 (c)Na2S2O7 (d)H2SO3 (a)a,c (b)a,b (c)b,c (d)a,d
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abcdefghijklmnopqrst
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sorry it's hard to solve ggicyicyicicyxyi
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