Question

In $IIIA$ group which element shows different behaviour from its other group members:

• A. $Al$
• B. $Ga$
• C. $In$
• D. $B$

Answer 1

The correct option is D $B$

Option $\left(D\right)$ is correct.

In $IIIA$ group, boron shows different behaviour from its other group members due to extremely low size and high nuclear charge/size ratio, high electronegativity and non-availability of $d$- electrons.