Please answer the following question in detail, specifically the query that is mentioned in the image.

Asked by Balbir | 22nd Jun, 2018, 02:16: PM

Expert Answer:

Above reactions are exceptional reactions 
These reactions of salt of oxyacids are given by Iodine only because Iodine is more electropositive than Chlorine and Bromine.
The main answer key to these reactions is ClO3- is a strong oxidizing agent than IO3-, hence Cl or Br is replaced by Iodine. As above said, these two are exceptional reactions.

Only following two reactions of oxyacids occur as follows:
 
2 K C l O subscript 3 space plus space I subscript 2 space rightwards arrow with blank on top space 2 K I O subscript 3 space plus space C l subscript 2

2 K B r O subscript 3 space plus space I subscript 2 space rightwards arrow with blank on top space 2 K I O subscript 3 space plus space B r 2
 
 
The above reactions may be verified from half-cell potentials,
 
2 C l O subscript 3 to the power of minus space plus space 12 H to the power of plus space plus space 10 e to the power of minus space rightwards arrow with blank on top space C l subscript 2 space plus space 6 H subscript 2 O space space space space space space space space space space space space space E to the power of o equals space 1.47 space V

2 I O subscript 3 to the power of minus space plus space 12 H to the power of plus space plus space 10 e to the power of minus space rightwards arrow with blank on top space I subscript 2 space space plus space space 6 H subscript 2 O space space space space space space space space space space space space space space space space E to the power of o equals space 1.195 space V
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
space space space space space space space space 2 C l O subscript 3 to the power of minus space plus space space I subscript 2 space space space space rightwards arrow with blank on top space space space 2 l O subscript 3 to the power of minus space space plus space space C l subscript 2 space space space space space space space space space space space space space space space space space space E to the power of o subscript c e l l space space end subscript equals space 0.275 space V
 
 
Now, Hope you understand these exceptional reactions. 
 
Hence the option D is the correct answer.

Answered by Ramandeep | 23rd Jun, 2018, 07:48: PM