Question

Number of electron-deficient molecules among the following:

PH₃, B₂H₆, CCl₄, NH₃, LiH and BCl₃

Options

• 0

• 1

• 2

• 3

Answer 1

2

Explanation:

Electron-deficient species have less than 8 electrons (or two electrons for H) in their valence (incomplete octet).

The octet of B₂H₆ and BCl₃ is incomplete.