Arrange the following metals in increasing order of their reducing power [Given : E0K+/k=−2.93V,E0Ag=+0.80V,E0Al3+/Al=−1.66V,E0Au3+/Au=+1.40V,E0Li/Li=−3.05V]
A
Li<K<Al<Ag<Au
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B
Au<Ag<Al<K<Li
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C
K<Al<Au<Ag<Li
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D
Al<Ag<Au<Li<K
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Solution
The correct option is BAu<Ag<Al<K<Li Elements having more negative value of reduction potential have greater reducing power. As the value becomes close to positive value the reducing power decreases. Elements having higher positive value of reduction potential are poor reducing agents and have low reducing power.