In the reaction of sodium thiosulphate with `I_(2)` in aqueous medium, the equivalent mass of sodium sulphate

In the reaction of sodium thiosulphate with I_(2) in aqueous medium the equivalent weight of sodium thiosulphate is equal to

The reaction of sodium thiosulphate with I_(2) gives:

The reaction of sodium thiosulphate with I_(2) gives:

The reaction of sodium thiosulphate with I_2 gives:

The reaction of sodium sulphate with I_(2) gives

What is the equivalent mass of sodium carbonate ?

Sodium carbonate reacts with SO_(2) in aqueous medium to give