When ozone reacts with an excess of potassium iodide solution buffered with a borate buffer (pH 9.2) iodine is liberated which can be titrated against a standard solution of sodium thiosulphate, this is a quantitative method for estimating `O_(3)` gas. when liberated `I_(2)` and sodium thiosulphate will react, then product is/are:

Options

A. `S_(4)O_(6)^(2-)`
B. `SO_(4)^(2-)`
C. `S_(2)O_(4)^(2-)`
D. `S`

Answer

A

Explanation

`I_(2)+2S_(2)O_(3)^(2-) to 2I^(-) +S_(4)O_(6)^(2-)`