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Question

Ferric iodide is very unstable but ferric chloride is a stable compound. This is because

A
hydration energy of ferric iodide is less than that of ferric chloride
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B
I ion is a stronger reducing agent as compared to Cl ion and thus, Fe3+ is easily reduced by I ion to Fe2+ ion.
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C
ferric iodide is a covalent compound whereas ferric chloride is ionic
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D
ferric iodide is a covalent compound whereas ferric chloride is ionic
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Solution

The correct option is B I ion is a stronger reducing agent as compared to Cl ion and thus, Fe3+ is easily reduced by I ion to Fe2+ ion.

2Fe3++2I2Fe2++I2


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