Jee Main
Salt Analysis
JEE Main 2025 (Online) 2nd April Evening Shift
MCQ+4 / -12025
Formation of $\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NOS}\right]$, a purple coloured complex formed by addition of sodium nitroprusside in sodium carbonate extract of salt indicates the presence of :