Molecular Geometry of SCN-

The video tutorial explains how to determine the molecular geometry of the SCN- ion using the Lewis structure and VSEPR theory. It describes the arrangement of sulfur, carbon, and nitrogen atoms, emphasizing the linear geometry due to the absence of lone pairs on the central carbon atom. The AXN notation is used to confirm the linear shape, and the bond angle is identified as 180°. A 3D representation is provided to visualize the linear arrangement of atoms.

What is the central atom in the SCN- molecule?

• Carbon

• Oxygen

• Sulfur

• Nitrogen

According to VSEPR theory, why is the SCN- molecule linear?

• Because of the presence of triple bonds

• Due to the presence of a single bond

• Due to the repulsion between bonded atoms

• Because of lone pairs on the central atom

In AXN notation, what does 'X' represent for SCN-?

• Total number of electrons

• Type of bonds present

• Number of atoms bonded to the central atom

• Number of lone pairs

How many atoms are bonded to the central carbon in SCN-?

• Four

• Two

• Three

• One

What is the bond angle in a linear molecule like SCN-?

• 120°

• 90°

• 180°

• 360°

Which molecular shape does AX2 correspond to?

• Bent

• Trigonal Planar

• Linear

• Tetrahedral

What is the significance of the absence of lone pairs on the central atom in SCN-?

• It causes the molecule to be bent

• It leads to a trigonal planar shape

• It results in a linear shape

• It makes the molecule non-polar

What does the 3D representation of SCN- confirm about its shape?

• It is trigonal planar

• It is linear

• It is bent

• It is tetrahedral

Which atoms are bonded to the central carbon in SCN-?

• Two sulfur atoms

• One sulfur and one nitrogen atom

• Two nitrogen atoms

• One oxygen and one nitrogen atom

What is the role of Dr. B in the video?

• To demonstrate chemical reactions

• To explain the molecular geometry of SCN-

• To teach about ionic bonds

• To discuss the periodic table