A mixture upon along adding conc. `H_(2)SO_(4)` gives deep red fumes. It may contain the anions pair `:`

Options

A. `Cr_(2)O_(7)^(2-)` and `C^(-)`
B. `Br^(-)` and `Cr_(2)O_(7)^(2-)`
C. `NO_(3)^(-)` and `Cl^(-)`
D. `CrO_(4)^(2-)` and `NO_(3)^(-)`

Answer

1

Explanation

`4Cl^(-)+Cr_(2)O_(7)^(2-)+6H^(+)rarr2CrO_(2)Cl_(2)uarr("deep red")+3H_(2)O`.