Introduction to UV Vis Spectroscopy Quiz

What is the wavelength range for ultraviolet (UV) and visible (VIS) regions of the electromagnetic spectrum?

• 100-400 nm

• 190-800 nm

• 800-1200 nm

• 400-700 nm

According to the Beer-Lambert Law, which of the following is NOT a variable in the equation A = εcl?

• Path length

• Temperature

• Concentration

• Molar absorptivity

What type of transition is considered "forbidden" according to selection rules?

• π → π*

• σ → σ*

• n → π*

• n → σ*

In electronic transitions, what is the most probable transition?

• LUMO to HOMO

• HOMO to LUMO

• n to σ

• σ to π*

A shift to a lower energy is

• Bathochromic shift

• Hypsochromic shift

• Hyperchromic shift

• Hypochromic shift

A shift to shorter wavelength is

• Bathochromic Shift

• Hypsochromic shift

• Hyperchromic shift

• Hypochromic Shift

Conjugation of two chromophores results in _____________shift

• Alcohols

• Sulphur compounds

• Aldehydes

• Alkanes

Which of the following factors does NOT affect the absorbance of a solution according to the Beer-Lambert Law?

• Path length of the light

• Concentration of the solute

• Molar absorptivity

• Nature of the solvent

What is the term for a shift in the absorption spectrum that indicates an increase in energy?

• Bathochromic shift

• Hypsochromic shift

• Hyperchromic shift

• Hypochromic shift