Podcast
Questions and Answers
What types of vibrations occur in molecules when irradiated with IR radiation?
What types of vibrations occur in molecules when irradiated with IR radiation?
- Rotational and translational vibrations
- Stretching and bending vibrations (correct)
- Symmetric and asymmetric vibrations
- Vibrations in the UV region
In which region of the spectrum does ultraviolet radiation lie?
In which region of the spectrum does ultraviolet radiation lie?
- High energy side of the visible spectrum (correct)
- Low energy side of the visible spectrum
- Far IR region
- Between visible and infrared spectrum
What type of energy is largely associated with infrared radiation?
What type of energy is largely associated with infrared radiation?
- Mechanical energy
- Electromagnetic energy
- Chemical energy
- Thermal energy (correct)
What property of molecules can be determined using IR spectroscopy?
What property of molecules can be determined using IR spectroscopy?
What law can be used to predict the oscillation frequency in molecules?
What law can be used to predict the oscillation frequency in molecules?
How are IR spectra usually recorded?
How are IR spectra usually recorded?
Which factor affects the vibrational frequency of a molecule according to Hook's Law?
Which factor affects the vibrational frequency of a molecule according to Hook's Law?
What happens to the vibrational frequency when the bond strength of a molecule increases?
What happens to the vibrational frequency when the bond strength of a molecule increases?
Which type of molecules have changing or fluctuating dipole moments during vibration and are considered IR active?
Which type of molecules have changing or fluctuating dipole moments during vibration and are considered IR active?
What is the formula to calculate the total degree of freedom for a linear molecule?
What is the formula to calculate the total degree of freedom for a linear molecule?
Which type of molecules are considered IR inactive due to having no dipole moment?
Which type of molecules are considered IR inactive due to having no dipole moment?
What is the essential condition for a molecule to be IR active according to the provided text?
What is the essential condition for a molecule to be IR active according to the provided text?
Why do IR spectra appear upside down and right to left?
Why do IR spectra appear upside down and right to left?
What is the essential condition for a molecule to be IR-active?
What is the essential condition for a molecule to be IR-active?
How many total degrees of freedom does a molecule with N atoms have?
How many total degrees of freedom does a molecule with N atoms have?
Why are homonuclear diatomic molecules not IR-active?
Why are homonuclear diatomic molecules not IR-active?
What kind of vibrations give rise to absorption in the IR region?
What kind of vibrations give rise to absorption in the IR region?
Why do fewer bands appear in the IR spectra than theoretically possible?
Why do fewer bands appear in the IR spectra than theoretically possible?
