S Block Elements Question 60
Question: K, Ca and Li metals may be arranged in the decreasing order of their standard electrode potentials as
Options:
A) K, Ca, Li
B) Li, K, Ca
C) Li, Ca, K
D) Ca, Li, K
Show Answer
Answer:
Correct Answer: B
Solution:
[b] $ L{{i}^{+}}+{{e}^{-}},E^{o}=-3.05V $
$ {{K}^{+}}+{{e}^{-}}\to K,E^{o}=-2.87V $
$ C{{a}^{+2}}+2{{e}^{-}}\to Ca,E^{o}=-2.87V $
BETA
