MCQ
In Carius tube, an organic compound ' $X$ ' is treated with sodium peroxide to form a mineral acid ' $Y$ '. The solution of $BaCl _2$ is added to ' $Y$ ' to form a precipitate ' $Z$ '. ' $Z$ ' is used for the quantitative estimation of an extra element. ' $X$ ' could be:
- ACytosine
- BChloroxylenol
- CA nucleotide
- ✓Methionine
