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B
+3
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C
+4
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D
+6
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E
+8
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Solution
The correct option is D+6 Let X be the oxidation number of S in H2SO4. The oxidation number of hydrogen is +1 and the oxidation number of oxygen is -2. 2(+1)+X+4(−2)=02+X−8=0X−6=0X=+6 Hence, the oxidation number of S in H2SO4is +6.