A well known orange crystalline compound (A) when burnt imparts violet colour to flame. (A) on treating with (B) and conc. `H_(2)SO_(4)` gives red gas (C ) which gives red yellow solution (D) with alkaline water. (D) on treating with acetic acid and lead acetate gives yellow precipitate (E). (B) sublimes on heating. Also on heating (B) with NaOH, gas (F) is formed which gives white fumes with HCl.
The compounds (A) and (B) are

Options

A. `Na_(2)CrO_(4)` and `NH_(4)Cl`
B. `Na_(2)Cr_(2)O_(7)` and `NH_(4)Cl`
C. `K_(2)Cr_(2)O_(7) ` and `NH_(4)Cl`
D. `NH_(4)Cl, Na_(2)CrO_(4)`

Answer

C

Explanation