Redox Reactions And Electrochemistry Ques 196

Question: The cell reaction of a cell is $ M{g_{(s)}}+C{u^{2+}}(aq)\to C{u_{(s)}}+M{g^{2+}}(aq) $ If the standard reduction potentials of $ Mg $ and $ Cu $ are $ -,2.37 $ and $ +,0.34,V $ respectively. The emf of the cell is [EAMCET 1995; JIPMER (Med.) 2001; AFMC 2002; CBSE PMT 2002]

Options:

A) 2.03 V

B) - 2.03 V

C) + 2.71 V

D) - 2.71 V

Show Answer

Answer:

Correct Answer: C

Solution:

$ E_{cell}^{o}=E_{Cathode}^{o}-E_{Anode}^{o} $ $ =0.34-(-,2.37)=+,2.71V $ .



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