Redox Reactions And Electrochemistry Ques 159

Question: The reaction is spontaneous if the cell potential is [MP PET 1999]

Options:

A) Positive

B) Negative

C) Zero

D) Infinite

Show Answer

Answer:

Correct Answer: A

Solution:

EMF = [s.r.p. of cathode-s.r.p of anode] Where s.r.p. = Standard reduction potential $ $ If EMF is positive then the reaction is spontaneous For e.g. in Galvanic cell EMF = 1.1 volt Cathode is made of copper Anode is made of Zinc EMF = 0.34 -(- 0.76) = 1.1 volt.



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