Assertion: The shape of XeF4 is square - planar

Explanation:

 XeF₄   has square planar shape and octahedral geometry.

This can be elaborated as follows:

The steric number (SN) of XeF₄ is 8+4/2 = 6.

So its hybridization based upon VSEPR theory is sp³d².

The distribution of these 6 steric components could be 4 bp (bond pair) and 2lp (lone pair).

According to VSEPER repulsion between l.p- l.p > l.p - b.p . So to minimize repulsion between lone pairs they should be placed at maximum distance from each other. The maximum distance between two lone pairs in an octahedral structure(sp³d²) is possible at an angle of 180° between them i.e. the two lone pairs placed extremely opposite to each other. Hence the assertion and reason are correct and reason is the correct explanation of assertion.

Final Answer:

Hence the correct answer is option A i.e. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion