A) \[C{{l}^{-}},Zn,{{H}_{2}},F{{e}^{2+}}\]
B) \[{{H}_{2}},Zn,F{{e}^{2+}},Cl\]
C) \[C{{l}^{-}}F{{e}^{2+}},Zn,{{H}_{2}}\]
D) \[{{H}_{2}}F{{e}^{2+}},C{{l}^{-}},Zn\]
E) \[C{{l}^{-}},F{{e}^{2+}},{{H}_{2}},Zn\]
Correct Answer: E
Solution :
The substances which have lower reduction potentials are stronger reducing agents. Hence the order of strength of reducing agent is increases in the following order: \[\xrightarrow[strength\text{ }of\text{ }reducing\text{ }agent-increases]{Cl<F{{e}^{2+}}<{{H}_{2}}<Zn}\]
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