Rotational spectroscopy

The different types of energies associated with a molecule are __________

• Vibrational energy

• electronic energy

• Rotational energy

• All of these

Molecules which are having _______ are microwave active.

• Dipole moment

• High pressure Detector

• Principle axis

• Acidity

A photon of wave number 100 cm^-1 has a wavelength of

• 1 m

• 1 mm

• 1000 nm

• 100 m

The photon described in Question 3 lies within which part of the electromagnetic spectrum?

• Radio wave

• Visible

• Infrared

• Ultraviolet

The energy in joules of a photon of wavelength 355 nm is

• 5.596 x 10¹⁹ J

• 5.596 x 10²⁸ J

Calculate the moment of inertia, I, of the molecule ¹H³⁵Cl. The masses of the two atoms are mH = 1.673 x 10²⁷ kg and mCl = 5.807 x 10²⁶ kg. The equilibrium bond length of the molecule is 1.275 Å.

• 2.644 x 10⁴⁷ kg m2

• 2.644 x 10²⁷ kg m2

• 2.644 x 10⁴⁴ kg m2

• 2.644 x 10²⁴ kg m2

Which of the following molecule has no rotational spectrum?

• NH₃

• HCl

• N₂

• H₂O.

The microwave active molecules are

• HCl, OCS

• CO,CO₂

• Both a) and b)

• None of the above

From the rotational microwave spectrum of ¹H³⁵Cl, we find that B = 10.59342 cm^-1 . Given that the masses of 1H and 35 Cl are 1.0078250 and 34.9688527 amu, respectively, determine the bond length of the 1H35Cl molecule

• 1.274 x 10^-10 m

• 1.674 x 10^-10 m

• 1.474 x 10^-10 m

• 1.0274 x 10^-10 m

The correct order of different types of energies is __________

• Eel >> Evib >> Erot

• Eel >> Erot >> Evib

• Evib >> Eel >> E rot

• None of these