Question

Yellow colored solution of $FeC{{l}_{3}}$ changes to light green, when:

• A. $SnC{{l}_{2}}$ is added
• B. Zn is added
• C. ${{H}_{2}}S$ gas is passed
• D. all of these

Answer 1

Answer: (D)

all of these

Answer 2

Yellow coloured solution of $FeC{{l}_{3}}$ is turned green due to the reduction of it. (i.e., conversion into $F{{e}^{2+}}$ ). $SnC{{l}_{2}}$ and ${{H}_{2}}S$ are reducing agent and Zn is more electropositive than Fe, hence, all of them turn yellow $FeC{{l}_{3}}$ solution into green $F{{e}^{2+}}$ solution.