Question

Boron halides behave as Lewis acids because they
a) are ionic compounds
b) are covalent compounds
c) have only six electrons in the valence shell
d) have a lone pair of electrons on boron atom

Answer 1

Covalents compound........

Answer 2

Hey dear,

◆ Answer -

Boron halides behave as Lewis acids because they have only six electrons in the valence shell.

◆ Explanation -

• Boron atom has 3 free e- in its outermost shell.
• These 3 e- pair with one e- each from three X atoms to form BF3 molecule.
• This BX3 molecule is electron deficient as it has only 6 e- in its valence shell.
• As lewis acids are electron deficient, boron halides act as Lewis acid.

Hope this helped.