Consider the given compounds ( 1 ) C H 3 – C H 2 – N H 2 ( 2 ) C H 3 – C H = N H ( 3 ) C H 3 – C ≡ N ( 4 ) C 2 H 5 – N H – C 2 H 5 Arrange basicity of these compounds in decreasing order:

Step-by-step solution

Here the correct order of basic nature is as follows C 2 H 5 – NH – C 2 H 5 > CH 3 – CH 2 – NH 2 > CH 3 – CH = NH > CH 3 – C ≡ N ( i ) Secondary amine is more basic than primary amine. ( i i ) C H 3 – C H = N s p 2 H iii CH 3 − C¹ ≡ N sp