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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Correct answer is D

No explanation has been provided for this answer.

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