A) 0.75 V
B) 1.5 V
C) 3.0V
D) 4.5V
Correct Answer: B
Solution :
Given, \[m=1g={{10}^{-3}}g\] Electrochemical equivalent \[Z=1.044\times {{10}^{-8}}kg/C\] Heat \[Q=34kcal=34\times 1000cal\] \[=34\times 1000\times 4.2J\] Mass liberated on electrode during electrolysis, \[m=Zq\] \[\therefore \] \[q=\frac{m}{Z}\] \[\therefore \] Required potential, \[V=\frac{H}{q}=\frac{34\times 1000\times 4.2\times 1.044\times {{10}^{-8}}}{{{10}^{-3}}}\] \[=1.5volt\]
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