Chemistry

Problem

Salt (A) gives brick red fumes (B) with conc.

\text{H}_2\text{SO}_4

and

\text{K}_2\text{Cr}_2\text{O}_7

which gives yellow solution (C) with

\text{NaOH}

and it gives yellow ppt. (D) with acetic acid and lead acetate. What is (C)? a.

\text{Na}_2\text{CrO}_4

\text{CrO}_2\text{Cl}_2

\text{PbCrO}_4

\text{NaCl}