If one of the inertia is zero, which group of this molecule belongs to?

• Symmetric tops

• Spherical tops

• Linear

• Asymmetric tops

Which of the molecules do not belong to linear group?

• HCl

• H2O

• H2

• OCS

Oblate symmetric tops is when

• Ia = Ib = Ic

• Ia < Ib = Ic

• Ia > Ib = Ic

Which of the following groups will not show any rotational spectrum?

• Spherical tops

• Symmetric tops

• Assymetric tops

• Linear (hetero nuclear atoms)

Which one is the correct equation for moment of inertia?

Microwave spectoscopy uses

• radio frequency

• microwave frequency

• visible light

• X-ray radiation

What is the main principle behind rotational spectroscopy?

• Interaction of electromagnetic radiation with rotating molecules

• Transmission of radio waves through molecules

• Reflection of light by molecules

• Absorption of sound waves by molecules

What is the significance of the moment of inertia in rotational spectroscopy?

• It only affects the color of the molecules

• It determines the speed of the rotating molecules

• It has no significance in rotational spectroscopy

• It determines the energy levels and transition frequencies of rotating molecules.

How does the rotational constant of a molecule relate to its moment of inertia?

• The rotational constant is equal to the moment of inertia.

• The rotational constant is directly proportional to the moment of inertia.

• The rotational constant is inversely proportional to the moment of inertia.

• The rotational constant is not related to the moment of inertia.

What is the difference between rigid rotor and non-rigid rotor in rotational spectroscopy?

• The rigid rotor assumes a constant bond length and ignores the vibrational motion of the molecule, while the non-rigid rotor takes into account the variation in bond length and considers the vibrational motion.

• The rigid rotor and non-rigid rotor are the same in rotational spectroscopy

• The rigid rotor takes into account the variation in bond length and considers the vibrational motion, while the non-rigid rotor assumes a constant bond length

• The rigid rotor considers the vibrational motion of the molecule, while the non-rigid rotor ignores the variation in bond length