Which one of the following conditions will increase the voltage of the cell represented by the equation? Cu(s)+2Ag+(aq.)⇌Cu2+(aq.)+2Ag(s).
A
Increase in the dimension of Cu electrode
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B
Increase in the dimension of Ag electrode
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C
Increase in the concentration of Cu2+ ion
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D
Increase in the concentration of Ag+ ion
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Solution
The correct option is D Increase in the concentration of Ag+ ion Cell voltage will increase, either by increasing the concentration of Cu2+ ion or by decreasing the concentration of Ag+. Q=[Cu2+][Ag+] Lesser is the value of Q, greater is the cell voltage.