Which of the following is a nucleophile ?

Options

A. `BH_(3)`
B. `NH_(3)`
C. `AlCl_(3)`
D. All of these

Answer

B

Explanation

Nucleophiles (i.e., species) are the species that have at least one lone pair of electrons for donation, i.e., they can also be called Lewis bases. Among the given, `BH_(3)` , and `AICI_(3)`, being electron deficient, behave like electrophiles while `NH_(3)` , deu to the presence of a lone pair over N, is a nucleophile.