Molecular Shapes Quiz

What determines the shape of a molecule?

• The number of atoms bonded to the central atom and the number of lone pairs on the central atom

• The number of protons in the central atom

• The size of the molecule

• The type of bonds (ionic or covalent)

What is the molecular shape of BeCl₂?

• Linear

• Bent

• Trigonal planar

• Tetrahedral

How many bonds are present in a CH₄ molecule?

• 2

• 3

• 4

• 5

Why do electron pairs repel each other in molecular shapes?

• Electrons are positively charged and repel protons.

• Electrons are negatively charged and repel each other.

• Electrons have no charge and are neutral.

• Electrons are held together by the central atom.

What is the molecular shape of PF₅?

• Linear

• Trigonal planar

• Trigonal bipyramidal

• Octahedral

What is the molecular geometry of AsF₅?

• Linear

• Octahedral

• Trigonal bipyramidal

• Tetrahedral

Why is the shape of NH₃ different from H₂O?

• NH₃ has three bonded atoms, while H₂O has two, and lone pairs affect their shapes differently.

• NH₃ is a larger molecule than H₂O.

• H₂O has fewer lone pairs than NH₃.

• NH₃ forms an ionic bond, while H₂O forms a covalent bond.

Which molecule is polar?

• Water

• Cooking oil

• Both are polar

• Neither is polar

How does the Thanksgiving experiment demonstrate the concept of polarity?

• It shows how molecules are bonded together in non-polar structures.

• It explains how water dissolves non-polar molecules.

• It demonstrates that polar molecules like water and non-polar molecules like oil do not mix.

• It shows that polar and non-polar molecules are the same.

What might happen if vinegar is added to the Thanksgiving experiment?

• It will mix with oil and repel water.

• It will mix with both oil and water.

• It will mix with water but not oil because vinegar is polar.

• It will not mix with either oil or water because vinegar is neutral.