1.

Hypo is the common name of sodium thiosulphate, with molecular formula Na_(2)S_(2)O_(3). It is used as intermediate in iodometric as well as in iodimetric titrations. Iodine and chlorine react with hypo in different ways as follows : 2na_(2)S_(2)O_(3)+I_(2) to 2NaI+Na_(2)S_(4)O_(6) Cl_(2)(g)+S_(2)O_(3)^(2-) to SO_(4)^(2-) + Cl^(-) +S Suppose, 50 mL of 0.01 M Na_(2)S_(2)O_(3) solution and 5xx10^(-4) mol of Cl_(2) are allowed to react according to the above equation. Hypo is also used in photography to dissolve AgBr, forming a complex compound. 2Na_(2)S_(2)O_(3) +AgBr to Na_(3)[Ag(S_(2)O_(3))_(2)]+NaBr Oxidation state of silver in Na_(3)[Ag(S_(2)O_(3))_(2)] is :

Answer»

`0`
`+1`
`+2`
`-1`

SOLUTION :N//A


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