Question

Amongst the following elements present in an organic compound, the one which has no direct test for detection is :

• A. $Cl$
• B. $N$
• C. $S$
• D. $O$

Answer 1

The correct option is D $O$

There is no test that can directly indicate the presence of oxygen in an organic compound. The presence of oxygen is indicated indirectly by the presence of groups containing oxygen.