Question

Which of the following is not a type of bending molecular vibration? *


Rocking

Stretching.

Wagging.

Twisting.

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Answer 1

Twisting is correct answer

Answer 2

Stretching is not a type of bending molecular vibration.  

• Molecular vibrations are of two types: stretching and bending molecular vibrations
• Therefore, stretching is one of the two types of molecular vibration and doesn't come under bending molecular vibration.
• Rocking, wagging, and twisting are the types of bending molecular vibration. There is also one more type called scissoring.
• Molecular vibration refers to the periodic vibration of an atom or molecule.
• In stretching molecular vibration, it is the bond length that changes.
• In bending molecular vibration, it is the bond angle that changes.