17. The difference in the oxidation numbers of the two types of sulphur atoms in $\mathrm { Na } _ { 2 } \mathrm {~S} _ { 4 } \mathrm { O } _ { 6 }$ is ANSWER : 5
Reaction of $\mathrm { Br } _ { 2 }$ with $\mathrm { Na } _ { 2 } \mathrm { CO } _ { 3 }$ in aqueous solution gives sodium bromide and sodium bromate with evolution of $\mathrm { CO } _ { 2 }$ gas. The number of sodium bromide molecules involved in the balanced chemical equation is.
17. The difference in the oxidation numbers of the two types of sulphur atoms in $\mathrm { Na } _ { 2 } \mathrm {~S} _ { 4 } \mathrm { O } _ { 6 }$ is
ANSWER : 5\\