In the qualitative analysis of an organic compound, the sample is strongly heated with dry copper(II) oxide in a hard glass tube. Which of the following element(s) in the organic compound are detected using this specific method?

Step-by-step solution

Carbon and hydrogen in an organic compound are detected by heating the compound with copper(II) oxide (CuO). During this process, the carbon present in the compound is oxidised to carbon dioxide (which turns lime water milky) and the hydrogen is oxidised to water (which turns anhydrous copper sulphate blue). Nitrogen, sulphur, halogens, and phosphorus are detected by preparing a sodium fusion extract (Lassaigne's test), not by heating with CuO. Answer: Carbon and Hydrogen