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Molecular Spectroscopy deals with the interaction of electromagnetic radiation with _______.

• molecule

• atom

• ion

• crystal

Electromagnetic radiation consists of discrete packets of energy which are called:

• Electrons

• Photons

• Protons

• Neutrons

A photon consists of an oscillating electric field (E) and an oscillating magnetic field (M) which are _______ to each other.

• perpendicular

• parallel

• opposite

• adjacent

According to MOT, in molecules, atomic orbitals combine to form _______ which surround the molecule.

• molecular orbitals

• ionic bonds

• lattice structures

• atomic nuclei

Molecular bonds have _______ potential energy than in separate atomic orbitals.

• Higher

• Lower

• Same

• Variable

Electrons prefer to stay in a molecular bond according to MOT.

• True

• False

Refer to the diagram showing the electromagnetic wave. What are the two fields shown as oscillating and perpendicular to each other?

• Electric field and Magnetic field

• Gravitational field and Electric field

• Sound field and Pressure field

• Thermal field and Magnetic field

Refer to the molecular orbital diagram. Which orbital has lower energy?

• Molecular orbital

• Atomic orbital

• Hybrid orbital

• Anti-bonding orbital

What is the principle of UV-Visible Spectrometer based on?

• The measurement of spectrum of a sample containing atoms/molecules.

• The measurement of temperature changes in a sample.

• The measurement of electrical conductivity of a sample.

• The measurement of mass of a sample.

Spectrum is a graph of intensity of absorbed or emitted radiation by sample versus ______ or wavelength (λ).

• frequency (ν)

• temperature (T)

• pressure (P)

• volume (V)