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CUET

Q8. An analysis of iron oxide shows that its formula is Fe1.903. What percentages of iron exists as Fe3+ and Fe4+ ions: (a) Fe3+ = 82.98% and Fe++ = 17.02% (b) Fe3+ = 84.21% and Fe4+ = 15.79% (c) Fe3+ = 15.79% and Fe4+ = 84.21% (d) Fe3+ = 17.02% and Fe++ = 82.98%