NEET Solved Paper 2018 Question 36
Question: Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below: [NEET - 2018]
Then the species undergoing disproportionation is
Options:
A) $ B{r_2} $
B) $ BrO_4^{-} $
C) $ BrO_3^{-} $
D) $ HBrO $
Show Answer
Answer:
Correct Answer: D
Solution:
$ \overset{+1}{\mathop{HBrO}},\xrightarrow{{}}\overset{0}{\mathop{B{r_2}}}, $
$ E _{HBrO/Br _2}^{O}=1.595V $ $ \overset{+1}{\mathop{HBrO}},\xrightarrow{{}}\overset{+5}{\mathop{BrO_3^{-}}},$
$ E _{BrO_3^{-}/HBrO}^{O}=1.5V $ $ E_cell^{o} $ for the disproportionation of $ HBrO $ , $ E_cell^{o}\text{-E} _{\text{HBrO/B}{r_2}}^{o}\text{-E} _{BrO_3^{-}\text{/HBrO}}^{o} $ $ \text{=1}\text{.595-1}\text{.5} $ $ \text{=0}\text{.095V=+ve} $
Hence, option is correct Sol..
