Molecular Geometry and Electron Pair Repulsion Quiz

In the VSEPR theory, what primary factor determines the bond angles in a molecule?

• Atomic mass
• Electron pair repulsion
• Molecular weight
• Electronegativity

Which molecule has the largest bond angle according to the provided data?

• Methane (CH4)
• Ammonia (NH3)
• Water (H2O)
• Carbon dioxide (CO2)

As the number of lone pairs increases in a central atom, what happens to the bond angles?

• Angles increase
• Angles remain constant
• Angles decrease
• Angles become unpredictable

Why do lone pairs cause a reduction in bond angles?

• They add mass to the molecule
• They create increased repulsion forces
• They change electron configuration
• They reduce molecular stability

In the methane (CH4) molecule, how many lone pairs are present?

• 0
• 1
• 2
• 3

What is the bond angle in the ammonia (NH3) molecule?

• 107°
• 109.5°
• 105°
• 180°

Which molecule demonstrates the most significant reduction in bond angle due to lone pairs?

• Methane
• Ammonia
• Water
• Carbon dioxide

In water (H2O), how many lone pairs are present on the central oxygen atom?

• 0
• 1
• 2
• 3

The VSEPR theory primarily explains molecular geometry based on:

• Atomic radius
• Electron pair arrangement
• Molecular polarity
• Chemical reactivity

Which molecule has a tetrahedral shape according to the VSEPR theory?

• CH4
• NH3
• H2O
• CO2