Which of the following statement are correct when a mixture of `Nacl` and `K_(2)Cr_(2)O_(7)` is gently warmed with conc.`H_(2)SO_(4)`?

Options

A. Deep red vapours are liberated
B. Deep red vapours dissolved in `NaOH(aq)` forming a yellow solution.
C. Greenish yellow gas is liberated
D. Deep red vapour dissolve in water forming yellow solution.

Answer

ABD

Explanation

`4Cl^(-)+Cr_(2)O_(7)^(2-)+6H^(+) to 2CrO_(2)Cl_(2)uparrow("deep red")+3H_(2)O`
`CrO_(2)Cl_(2)+4OH^(-) to CrO_(4)^(2-)("yellow")+2H_(2)O+2Cl^(-)`
`CrO_(2)Cl_(2)+H_(2)O to H_(2)CrO_(4)+HCl`