Molecular Geometry of HCN

The video tutorial explains the electron and molecular geometry of hydrogen cyanide (HCN). It begins by identifying the central carbon atom and the two bonded atoms, leading to a linear electron geometry due to the absence of lone pairs. The tutorial further explores the 3D molecular geometry, highlighting the linear arrangement of hydrogen and nitrogen around the carbon. The video concludes with a recap of the key points, emphasizing the linear geometry of HCN.

What is the central atom in the electron geometry of HCN?

• Hydrogen

• Carbon

• Nitrogen

• Oxygen

How many things are bonded to the central atom in HCN?

• Four

• Three

• Two

• One

What type of electron geometry does HCN exhibit?

• Bent

• Trigonal planar

• Linear

• Tetrahedral

In the 3D structure of HCN, what type of bond exists between carbon and nitrogen?

• Double bond

• Single bond

• No bond

• Triple bond

Why does HCN have a linear molecular geometry?

• Due to the triple bond with nitrogen

• Because there are no lone pairs on the central atom

• Due to the single bond with hydrogen

• Because of lone pairs on carbon

What is the significance of the Lewis structure in understanding HCN's geometry?

• It helps visualize the 3D structure

• It confirms the linear geometry

• It shows the number of atoms

• It indicates the presence of lone pairs

What is the molecular geometry of HCN?

• Bent

• Linear

• Tetrahedral

• Trigonal planar