Molecular Geometry and Bond Angles

The video explains VSEPR theory, which predicts molecular shapes based on electron repulsion. It covers various molecular geometries: linear (e.g., BeCl2, CO2), trigonal planar (e.g., BH3, COCl2), tetrahedral (e.g., methane, SiF4), trigonal pyramidal (e.g., NH3), and bent (e.g., water, SO2). Each geometry is described with examples, bond angles, and the influence of lone pairs.

What does VSEPR stand for in molecular geometry?

• Valence Shell Electron Proton Attraction

• Valence Shell Electron Pair Repulsion

• Valence Shell Electron Proton Repulsion

• Valence Shell Electron Pair Attraction

Which of the following molecules has a linear geometry?

• CH4

• NH3

• CO2

• H2O

What is the bond angle in a trigonal planar molecular geometry?

• 180 degrees

• 109.5 degrees

• 90 degrees

• 120 degrees

Which molecule is an example of a trigonal planar structure?

• NH3

• CH4

• BH3

• H2O

What is the bond angle in a tetrahedral molecular geometry?

• 120 degrees

• 109.5 degrees

• 90 degrees

• 180 degrees

Which of the following is an example of a tetrahedral molecule?

• SO2

• NH3

• CO2

• CH4

What distinguishes a trigonal pyramidal structure from a trigonal planar structure?

• Presence of a triple bond

• Presence of four atoms around the central atom

• Presence of a lone pair on the central atom

• Presence of a double bond

Which molecule is an example of a trigonal pyramidal structure?

• NH3

• SO2

• CH4

• CO2

What is the bond angle in a bent molecular geometry like water?

• 180 degrees

• 120 degrees

• 104.5 degrees

• 90 degrees

Which of the following molecules has a bent geometry?

• H2O

• NH3

• CH4

• CO2