List of top Chemistry Questions on Structure of Amines asked in KEAM

Which among the following has least \( \text{p}K_b \) value?

The order of basic strength of following amines is: (i) \( CH_3NH_2 \) (ii) \( (C_2H_5)_2NH \) (iii) \( C_6H_5NH_2 \) (iv) \( C_6H_5NHCH_3 \)