If on adding $FeCl_3$ solution to acidified Lassaigne solution of an organic compound a blood red colouration is produced,it indicates the presence of

During the fusion of an organic compound with sodium metal,the nitrogen present in the organic compound is converted into:

What happens when an organic compound is fused with sodium metal?

What can be inferred if a blood-red color is obtained in the Lassaigne's test?

Given below are two statements :
Statement $I$ : Nitrogen,sulphur,halogen and phosphorus present in an organic compound are detected by Lassaigne's Test.
Statement $II$ : The elements present in the compound are converted from covalent form into ionic form by fusing the compound with Magnesium in Lassaigne's test.
In the light of the above statements,choose the correct answer from the options given below :

Why is the test for nitrogen,sulphur,or halogens not carried out by the direct addition of reagents to an organic compound?