The Beilstein test is used for the detection of:

Lassaigne’s test is used to detect which of the following elements in an organic compound?

The violet color obtained in the Lassaigne's test for a sulfur-containing compound is due to the formation of which species?

Lassaigne's test is not used for the detection of the element . . . . . . in the organic compound.

Nitrogen detection in an organic compound is carried out by Lassaigne's test. The blue colour formed corresponds to which of the following formulae?

An organic compound $A$ is oxidized with $Na_2O_2$ followed by boiling with $HNO_3$. The resultant solution is then treated with ammonium molybdate to yield a yellow precipitate. Based on the above observation,the element present in the given compound is: