The equivalent mass of `Na_(2)S_(2)O_(3)` (molar mass =M ) when it reacts with `I_(2)` in acidic medium is

A: Equivalent mass of K_(2) Cr_(2),O_(7) , when it acts as an oxidizing agent in acidic medium is M//6. R: During reduction, oxidation number of chromium changes from +6 to +3.

The equivalent weight of Na_(2)S_(2)O_(3) ( Mol. wt = M ) in the reaction , 2Na_(2)S_(2)O_(3) + I_(2) rarr Na_(2) S_(4)O_(6) + 2NaI is-

The equivalent mass of H_(3)BO_(3) in its reaction with NaOH to form Na_(2)B_(4)O_(7) is equal to :

Na_(2)S_(2)O_(3)+I_(2)rarr Product is