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In the standard electrode potential series, F₂/F⁻ has E° = +2.87 V and Li⁺/Li has E° = −3.05 V. Which of the following is correct?
ALi⁺ is the strongest oxidising agent
BF₂ is the strongest reducing agent
CF₂ is the strongest oxidising agent; Li metal is the strongest reducing agent in aqueous solution
DBoth F₂ and Li⁺ are reducing agents
Answer & Solution
Correct answer: C. F₂ is the strongest oxidising agent; Li metal is the strongest reducing agent in aqueous solution
High +ve E° → strong tendency to gain electrons → strong **oxidising agent** (F₂). Most −ve E° → strong tendency to lose electrons → strong **reducing agent** (Li metal). Note: Li ranks lower than Cs in IE alone, but in aqueous solution Li is the strongest reducing agent due to its very high hydration enthalpy.
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