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vii. What is the oxidation state of S in H2SO4.

Answer:-

(Oxidation number of H) + (Oxidation number of S) + (Oxidation number of O) = 0

2 × (+1) + (Oxidation number of S) + 4 × (- 2) = 0

Oxidation number of S + 2 – 8 = 0

Hence, oxidation number of ‘S’ in H_{2}SO_{4} = +6