VSEPR Review

What is the bond angle in a trigonal planar molecule?

• 90 degrees

• 120 degrees

• 180 degrees

• 109.5 degrees

What is a lone pair?

• A pair of non-bonding electrons on the central atom.

• A pair of bonding electrons shared between two atoms.

• A single electron that is not involved in bonding.

• A pair of electrons that are involved in a double bond.

Identify the molecule with the formula H2S.

• H2S has a linear molecular geometry due to the presence of lone pairs.

• H2S has a tetrahedral molecular geometry due to the presence of lone pairs.

• H2S has a bent molecular geometry due to the presence of lone pairs.

• H2S has a trigonal planar molecular geometry due to the presence of lone pairs.

What is the bond angle in a tetrahedral molecule?

• 90 degrees

• 109.5 degrees

• 120 degrees

• 180 degrees

What molecular geometry is associated with two bonding pairs and two lone pairs?

• Linear

• Trigonal Planar

• Bent

• Tetrahedral

What is the effect of lone pairs on bond angles?

• Lone pairs have no effect on bond angles.

• Lone pairs repel more strongly than bonding pairs, reducing bond angles.

• Lone pairs increase bond angles between bonding pairs.

• Lone pairs create additional bonds, increasing bond angles.

What is the molecular geometry of NH3?

• Trigonal pyramidal.

• Linear.

• Tetrahedral.

• Trigonal planar.

What is the molecular geometry of BF3?

• Tetrahedral

• Trigonal planar

• Linear

• Octahedral

What is the shape of a molecule with four bonding pairs and no lone pairs?

• Tetrahedral

• Trigonal planar

• Linear

• Octahedral

What is the molecular geometry of CO2?

• Bent

• Trigonal Planar

• Linear

• Tetrahedral