Amongst the following elements present in an organic compound, the element which does not have a direct test is 

Which of the following element is present in teflon ?

Which of the following element is present in insulin ?

The element that does not answer the flame test is

The element hydrogen is present in…….organic compounds.

Which of the following elements present in an organic compound are detected are Lassaigne's test? (i) P (ii) X (iii) S (iv) N

Amongst the following elements, the highest ionization energy is

Which of the following elements in an organic compound cannot be detected by Lassaigne’s

Which amongst the following element can from amphoteric oxide ?