Question

Beilstein test is used for the detection of

• A. Cl
• B. Na
• C. N_2
• D. CO_2

Answer 1

Answer: (A)

$Cl$

Answer 2

The Beilstein test is a qualitative chemical test used for the detection of halogens (chlorine, bromine, iodine) in organic compounds. A positive test is indicated by a green or blue-green flame color when a copper wire, contaminated with the organic compound, is heated in a flame. This color is due to the formation of volatile copper halides. Among the given options, $Cl$ (Chlorine) is a halogen and will give a positive Beilstein test. $Na$ (Sodium) produces a characteristic yellow flame, while $N_2$ and $CO_2$ do not produce any characteristic flame color in this test.