Sodium nitrite is reacted with `H_(2)SO_(4)` to form `NaHSO_(4) , HNO_(3)` , water and X . Gold is dissolved in aqua-regia to form water , `AuCl_(4)^(-)` and Y,X and Y are respectivley

Options

A. `NO,NO^(2)`
B. `NO_(2),NO`
C. `NO,NO`
D. `N_(2)O, NO`

Answer

C

Explanation

Sodium nitriteis reacted with `H_(2) SO_(4)` to form ` NaHSO_(4), HNO_(3)` , water and NO gas (X) . Gold is dissolved in aqua-regia to form water, `AuCl_(4)^(-)` and NO gas . Thus , here x is NO and Y is NO. reactions involved are as follows :
`underset("nitrite")underset("sodium")(NaNO_(2))+H_(2) SO_(4) to NaHSO_(4) +HNO_(3) +H_(2)O+underset((X))(NO)`
`Au (s) + ubrace(HNO_(3)+4HCl)_("Aqua- regia")hArr AuCl_(4)^(-) +underset((Y))(NO) +H_(2)O`