A. Pale green
B. Pale red
C. Brown
D. Colourless
Correct Answer:
Option A – Pale green
Explanation
A reaction between Iron (iii) chloride and Hydrogen sulphide leads to the reaction
2FeCl3(aq) + H2S(g) → 2FeCl2(aq) + 2HCl(aq) + S(s)
The colour change is from REDDISH BROWN to PALE GREEN.
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