Question

$NH_3$ and $BF_3$ form adduct readily because they form

• A. ionic bond
• B. covalent bond
• C. co-ordinate bond
• D. hydrogen bond

Answer 1

Answer: (C)

co-ordinate bond

Answer 2

$NH_3$ acts as lewis base while $BF_3$ acts as lewis acid $H_3N : \rightarrow BF_3$.