Which of the following molecules is not planar?

I_{2} C l_{6}

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A l_{2} C l_{6}

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X e F_{4}

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B_{3} N_{3} H_{6}

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Solution

The correct option is B $A l_{2} C l_{6}$

$I_{2} C l_{6}$
Iodine has two lone pairs and 4 bond pairs and thus the hybridisation of both the Iodine is $s p^{3} d^{2}$ , and the structure of molecule is the combination of two square planar structures. Planar

$A l_{2} C l_{6}$ Both the almunium atoms have only 4 bond pairs and the hybridisation is $s p^{3}$ . The dimer of this molecule is the combination of two tetrahedral structures, making it a non-planar structure. Non-planar

$X e F_{4}$ Xe is the central atom, which has 4 bonded pairs and 2 lone pairs. So the hybridisation is $s p^{3} d^{2}$ . Two lone pairs are situated opposite to each other in the axial positions to minimise repulsion. Planar

$B_{3} N_{3} H_{6}$ This molecule is known as inorganic benzene due to its resemblance to benzene. It is a planar molecule. Planar

Thus, $A l_{2} C l_{6}$ is Non-planar

Suggest Corrections

$I_{2} C l_{6}$	Iodine has two lone pairs and 4 bond pairs and thus the hybridisation of both the Iodine is $s p^{3} d^{2}$ , and the structure of molecule is the combination of two square planar structures.	Planar
$A l_{2} C l_{6}$	Both the almunium atoms have only 4 bond pairs and the hybridisation is $s p^{3}$ . The dimer of this molecule is the combination of two tetrahedral structures, making it a non-planar structure.	Non-planar
$X e F_{4}$	Xe is the central atom, which has 4 bonded pairs and 2 lone pairs. So the hybridisation is $s p^{3} d^{2}$ . Two lone pairs are situated opposite to each other in the axial positions to minimise repulsion.	Planar
$B_{3} N_{3} H_{6}$	This molecule is known as inorganic benzene due to its resemblance to benzene. It is a planar molecule.	Planar