Why can `CH_3CN` behave both as nucleophile and electrophile?

Which of the following molecules can act as a nucleophile and an electrophile?

Formulate the following as a two - step reaction and designate the nucleophile and electrophile in each step: CH_(2)=CH_(2)+Br_(3)toBrCH_(2)CH_(2)Br

Which can act as both electrophile and nucleophile-

Identify the reagents underlined in the following equations as nucleophiles or electrophiles: (1) CH_(3)COOH+underline(HO)^(-) rarrCH_(3)COO^(-)H_(2)O (2) CH_(3)COCH_(3)+overset(Theta)(C)Nrarr(CH_(3))_(2)C(CN)(OH) (3) C_(6)H_(6)+CH_(3)overset(+)(C)OrarrC_(6)H_(5)COCH_(3)

What are electrophiles and nucleophiles ? Give an example of neutral electrophile and nucleophile.

Which of the following can act neither as an electrophile nor as a nucleophile-

What are electrophiles, nucleophiles and free radicals? Explain with examples.

Why does BF_3 behave as Lewis acid?

Why SiCl_4 behaves as a Lewis acid?