Molecular Operations and Identity Elements

The video tutorial explains the concept of the identity element in molecules, symbolized by 'e'. It describes how the identity element is present in all molecules and is equivalent to a 360-degree rotation, resulting in the molecule returning to its original position. The tutorial also covers asymmetric and chiral molecules, which only have the identity element. It further explains how to calculate the CN value for the identity element and discusses the consequences of having an identity element. An example using an ammonia molecule illustrates the identity operation.

What is the symbol used to represent the identity element in molecules?

• M

• I

• E

• X

What is the nature of molecules that only have the identity element?

• Non-polar

• Metallic

• Asymmetric

• Symmetric

How is the CN value for the identity element calculated?

• 180 divided by 360

• 360 divided by 180

• 2 pi by Theta

• Theta by 2 pi

What is the CN value for the identity element?

• 2

• 1

• 3

• 0

What does a C1 rotation signify in terms of molecular operation?

• No rotation

• Rotation by 360 degrees

• Rotation by 90 degrees

• Rotation by 180 degrees

In the ammonia molecule example, what happens after a 120-degree rotation?

• Molecule becomes asymmetric

• Nitrogen moves

• Hydrogens remain in place

• Hydrogens replace each other

What is the result of performing three C3 operations on a molecule?

• Asymmetry

• Identity

• Inversion

• Mirror image

What is the result of two C2 operations?

• Identity

• Asymmetry

• C4

• C3

What is the result of four C4 operations?

• C2

• Identity

• C3

• Asymmetry

What does the equation 'c n raised to n is equal to e' signify?

• Identity

• Mirror image

• Asymmetry

• Inversion