Question

The halogen form compound among themselves with the formula ${AA}^{{}^{\prime }},{AA}_3^{{}^{\prime }},{AA}_5^{{}^{\prime }}$ and ${AA}_7^{{}^{\prime }}$ where $A$ is the heavier halogen. Which of the following pairs representing their structure and being polar and non-polar are correct ?
(A) ${AA}^{{}^{\prime }}$ linear, polar
(B) ${AA}_3^{{}^{\prime }}$ $T-$ Shaped, polar
(C) ${AA}_5^{{}^{\prime }}$ square pyramidal, polar
(D) ${AA}_7^{{}^{\prime }}$ pentagonal bipyramidal, non-polar

• A. $\left(A\right)$ and $\left(C\right)$ are correct
• B. $\left(A\right)$, $\left(B\right)$ And $\left(C\right)$ are correct
• C. $\left(B\right)$, $\left(C\right)$ and $\left(D\right)$ are correct
• D. $\left(A\right)$, $\left(B\right)$, $\left(C\right)$ and $\left(D\right)$ are correct

Answer 1

The correct option is A $\left(A\right)$ and $\left(C\right)$ are correct

$A{A}^{\prime }$ linear,polar as both halogen atoms with different electronegativity has polarity. Eg-$I-Cl$

$A{A}_5^{{}^{\prime }}$ square pyramidal and polar due to the high electronegativity of other atom. Eg-$I{F}_5$