First slide

Lewis theory

Question

${BF}_{3}, {PF}_{3}, {CF}_{4}, {SiF}_{4}, {PF}_{5}$ . How many can neither act like a Lewis acid nor like a Lewis base

Difficult

A

1
B

2
C

3
D

4

Solution

${BF}_{3}$ …. Lewis acid …… less than octet
${SiF}_{4}$ …. Lewis acid …… can expand octet
${PF}_{5}$ …. Lewis acid …… can expand octet
${PF}_{3}$ …. Lewis base …… contains a lone pair on central atom, can also act as Lewis acid due to availability of vacant d-orbital.
${CF}_{4}$ ….. Not a Lewis acid …… cannot expand valency.
${CF}_{4}$ ….. Not a Lewis base …… No lone pair on central atom.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App