Salt $(A)$ gives brick red fumes $(B)$ with conc. $\mathrm{H}_2 \mathrm{SO}_4$ and $\mathrm{K}_2 \ma

Question

Salt $(A)$ gives brick red fumes $(B)$ with conc. $\mathrm{H}_2 \mathrm{SO}_4$ and $\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$ which gives yellow solution (C) with NaOH and it gives yellow ppt. ( $D$ ) with acetic acid and lead acetate. What is ( $C$ )?

Professor PC Thomas Classes · Answer

See detailed solution for explanation.