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When H2S gas is passed into a solution of iron (III) chloride, the colour changes from ...

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When H2S gas is passed into a solution of iron (III) chloride, the colour changes from yellow to green. This is because?

A. H(s)S is reduced to S
B. Fe3+ ions are oxidized by H(s)S
C. Fe3+ ions are oxidized Fe3+ ions
D. Fe3+ ions are reduced to Fe2+ ions




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