Question

Which of the following is highly covalent?
1) AlF3
2) AICI3
3) AIBr3
4) CCL4​

Answer 1

The Covalent nature of a compound is directly proportional to its polarization

Polarization increases as the size of the anions increases and decreases as the size of the cations increases

Hence AlBr3 has the highest Covalent character

The increasing order is

1<2<4<3

I hope this helps ( ╹▽╹ )