Which of the following statements is not applicable to Beilstein test?

Options

A. Green or bluish green flame is due to the formation of volatile cupric halides
B. It does not tell us to which halogen is present in the organic compound
C. It is a very sensitive test that can be easily performed
D. It is a sure test for the presence of halogen

Answer

D

Explanation

If organic compound gives blue or green colour at the tip of red hot copper wire, this indicates the presence of halogens in the compound. However, compounds like urea, thiourea etc. also give blue or green colour in this test even in the absence of halogens, thus, it is not a sure test for halogens.