JEE Main · 2018 · 08 Apr 2018 · Offline · Chemical Bonding and Molecular Structure

Which of the following are Lewis acids?

Answer: (A), (C)

Solution

Lewis acids accept an electron pair. (A)

BC l_{3}

(electron-deficient B) and

AlC l_{3}

(electron-deficient Al) are both Lewis acids; (C)

AlC l_{3}

and

SiC l_{4}

(Si accepts pairs via vacant d-orbitals, e.g.

SiC l_{6}^{2 -}

) are both Lewis acids.

P H_{3}

is a Lewis base. Hence (A) and (C).

JEE Main · 2018 · 08 Apr 2018 · Offline · One or more correct options