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# Four alkali metals A,B,C and D are having standard electrode potentials as -3.05,-1.66,-0.40 and 0.80v respectively,which one will be the most reducing agent?

$(a)\;D\qquad(b)\;B\qquad(c)\;C\qquad(d)\;A$

Less value of standard reduction potential is powerful reducing agents.
Hence (d) is the correct answer.