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.
