Chemistry - PRACTICAL ORGANIC CHEMISTRY Question with Solution | TestHub

$2\mathrm{CuO}+\mathrm{C}\underset{\Delta }{\to }2\mathrm{Cu}+{\mathrm{CO}}_2$ "Lassaigne's test" is used to detect Nitrogen, Halogen, Sulphur, Phosphorus. $4^{\text{th }}$ option is detection of carbon, it is not "Lassaigne's test".