Q.

In carius tube, an organic compound ‘X’ is treated with sodium peroxide to form a mineral acid ‘Y’.

The solution of BaCl2 is added to ‘Y’ to form a precipitate ‘Z’. ‘Z’ is used for the quantitative estimation of an extra element. ‘X’ could be       [2023]

1 Methionine  
2 Chloroxylenol  
3 Cytosine  
4 A nucleotide  

Ans.

(1)

Carius method is used for quantitative estimation of sulphur.