Question

detect the presence of nitrogen atom in a given organic compound o

Answer 1

We can do it by either Dumas method or by kjaldal's method

Answer 2

Explanation:

1. In soda ash tube take two three pieces of sodium metal and heat them until they get melt.Now add 6 - 8 pinches of organic compound to that and again heat it it until the bottom of tube becomes red hot. Carbon nitrogen present in the compound will get fused with sodium metal to give sodium cyanide.

$Na+C+N\rightarrow NaCN$

2. Crush the soda ash tube in china dish filled with water carefully and boil the content.After boiling filter it out.

3. Take small of amount filtered solution in a test tube and add ferrous sulfate which will give sodium ferrocynaide and sodium sulfate in the solution.

$6NaCN+FeSO_4\rightarrow Na_4[Fe(CN)6]+Na_2SO_4$

4.  Add ferric chloride to the solution in step 3 prussian blue color of ferri ferrocyanide will be obtained which confirms the presence of nitrogen in the organic compound..  

$3Na_4[Fe(CN)6]+4FeCl_3\rightarrow Fe_4[Fe(CN)6]_3 (\text{prussian blue})+12NaCl$