Nucleophlicity &basicity . explain
Dear Nitin
Nucleophilicity (In the context of organic chemistry): Ability of a group with a lone pair of electrons to push another such group out of a carbon centre.
Basicity: Ability of a group to combine with a proton (Bronsted).
Ability of a group to donate a lone pair (Lewis).
If you want detail information about the above topic
Please go through the below link:
https://www.quora.com/Organic-Chemistry-What-are-the-differences-between-nucleophilicity-and-basicity-1
All the best.