Which one of the following reactions does not belong to "Lassaigne's test"?

Question

Professor PC Thomas Classes · Answer

(b) : $2 \mathrm{CuO}+\mathrm{C} \xrightarrow{\Delta} 2 \mathrm{Cu}+\mathrm{CO}_2$
The given reaction is used to detect the presence of carbon in organic compounds. Lassaigne's test is used to detect nitrogen, sulphur, halogens and phosphorus in organic compounds.