Question

`ZnXoverset("dil."H_(2)SO_(4))(rarr)underset("Colourless gas")(A)+B` A overset(K_(2)Cr_(2)O_(7))(rarr)Y` (Yellow turnbidity) `+` Green Solution.
Then X is
A. `NO_(2)^(-)`
B. `S_(2)O_(3)^(2-)`
C. `SO_(3)^(2-)`
D. `S^(2-)`

Answer 1

Correct Answer - D
`ZnSoverset("dil" H_(2)SO_(4))(rarr)underset((B))(ZnSO_(4))+`
`underset((A))(H_(2)S)overset(K_(2)Cr_(2)O_(7))(rarr)Sdarr+Cr^(3+)`