`NaHSO_3overset(NaCO_3)to(A)underset(Delta)overset("Element S")to(B)overset(I_2)to( C)`
Find out the oxidation state of sulphur in the compound (A) to ( C).Give average value without sign, if the compound formed has more than one sulphur atoms. Does not consider the decimal.For example if the value is 3.5 than neglact the decimal and consider it as 35

Answer

4,2,2,5

Explanation

(A)`Na_2SO_3`
(B)`Na_2S_2O_3`
(C )`Na_2S_4O_6`
`NaHSO_3+Na_2CO_3toNa_2SO_3(A)+H_2O+CO_2`
`Na_2SO_3+Soverset(Delta)toNa_2S_2O_3`(B)
`2Na_2S_2O_3+I_2toNa_2S_4O_6`(C )+2NaI
(A)`SO_3^(2-)`, x+3(-2)= -2
x=6-2=4
(B)`S_2O_3^(2-)`, 2x+3(-2)= -2
2x=6-2=4
x=2
(C )`S_4O_6^(2-)`, 4x+6(-2)= -2
4x=12-2=10
x=10/4 =2.5