Redox Reactions And Electrochemistry Ques 291
Question: On the basis of the information available from the reaction $ \frac{4}{3}Al+O_2\to \frac{2}{3}Al_2O_3,\Delta G=-827kJmo{l^{-1}} $ of $ O_2 $ , the minimum emf required to carry out an electrolysis of $ Al_2O_3 $ is (F = 96500C $ mo{l^{-1}} $ ) [CBSE PMT 2003]
Options:
A) 8.56 V
B) 2.14 V
C) 4.28 V
D) 6.42 V
Show Answer
Answer:
Correct Answer: B
Solution:
$ V=\frac{827\times 10^{3}}{4\times 96500}=2.14,V $ .
