Oxidation number of sulphur in `H_(2)SO_(5)` isA. `+2`B. `+4`C. `+8`D.

1.	Oxidation number of sulphur in `H_(2)SO_(5)` isA. `+2`B. `+4`C. `+8`D. `+6`
Answer» Correct Answer - D `H-O-O-overset(O)overset(\|\|)underset(O)underset(\|\|)(S)-O-H` `2xx(+1)+x+3xx(-2)+2xx(-1)` (for `H`) (for `S`) (for `O`) (for `O-O`) `implies 2+x-6-2=0` ` implies x=6`

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`0.80 g` of sample of impure potassium dichromate was dissolved in water and made up to `500 mL` solution. `25 mL` of this solution treated with excess of `KI` in acidic medium and `I_(2)` liberated required `24 mL` of a sodium thiosulphate solution. `30 mL` of this sodium thiosulphate solution required `15 mL` of `N//20` solution of pure potassium dichromate. What was the percentage of `K_(2)Cr_(2)O_(7)` in given sample?A. `73.5%`B. `75.3%`C. `36.75%`D. none of these
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Oxidation number of sulphur in `H_(2)SO_(5)` isA. `+2`B. `+4`C. `+8`D. `+6`

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