Molecular Geometry | MCQs

Explanation

According to Valence Shell Electron Pair Repulsion (VSEPR) theory, XeF₄ (xenon tetrafluoride) has a square planar geometry.

Xenon in XeF₄ has six electron pairs around it: four bonding pairs and two lone pairs.

Explanation

Iodine heptafluoride (IF₇) has a pentagonal bipyramidal structure.

In this geometry, iodine is surrounded by seven fluorine atoms:

• five fluorines are arranged in a plane forming a pentagon,
• and the other two fluorines are positioned above and below this plane,
• forming the axial positions.

This arrangement minimizes electron pair repulsion around the iodine atom.

Explanation

Explanation

 Pyramidal molecular structure is typically found in molecules like ammonia (NH₃), where there is a central atom with lone pairs and three bonded atoms.

Explanation

Remember that water has 2 lone pairs on oxygen.

Hence, according to VSEPR theory, the water molecule arrives at a bent or a V-shape

Due to the presence of lone pair-lone pair, lone pair-bond pair and bond pair-bond pair repulsions

Explanation

The molecular Geometry of SF6 (sulfur hexafluoride) is octahedral. 

In this molecule, the central atom i.e. sulphur has a total of six electrons in its valence shell

And in the molecule, we have six fluorine atoms so it shares one electron with each fluorine atom.

So this molecule has six bond pairs and no lone pair.

So its structure is octahedral

The bond angles in sulfur hexafluoride molecules are 90A∘ and 180A∘.

Explanation

In SF6 (sulfur hexafluoride), the central sulfur atom is bonded to six fluorine atoms in an octahedral arrangement. This results in two types of bond angles:

• The F-S-F bond angles in the equatorial plane are 90°
• The F-S-F bond angles between the equatorial and axial fluorine atoms are 180°

Explanation

Explanation

Only lone pairs participate in determining geometry of molecules this statement is NOT a feature of Valence Shell Electron Pair Repulsion (VSEPR) theory.

As both lone pairs and bonding pairs of electrons participate in determining the geometry of molecules.

VSEPR theory states that electron pairs (both bonding and lone pairs) repel each other, influencing the shape of the molecule.