Question

Identify (A),(B),(C ) and (D) and example reactions .
(A) (green coloured salt) `+ K_(2)Cr_(2)O_(7) + "conc" H_(2)SO_(4) overset(Delta) to(B) `
(B) (redidish brown gas) + `NaOH rarr ( C) `
(C ) `+ (CH_(3)COO)_(2)Pb rarr (D ) `(yellow ppt)
`(A) +NaOH + Br_(2) water overset(Delta) to (C ) `
(C ) `+ (CH_(3)COO)_(2) Pb overset(Delta) to (D)`

Answer 1

(A) `CrCI_(3)`
(B) `CrO_(2)CI_(2)` [by chromyl-chloride4 rest of `CI^(Theta)]`
(C ): `NaCrO_(4)`
(D): `PbCrO_(4)`