UV Visible spectroscopy Part 1

Select the wavelength range corresponding to UV-visible region.

• 400-800 nm

• 200-800 nm

• 25 μm-2.5 μm

• 2.5 μm – 1mm

The possible transitions for water molecule in UV-visible region are

• σ →σ^*

• n→π^*, π→π^*

• σ→σ^*, n→π^*

• n → σ^*

UV visible spectroscopy is also called as................................................................ spectrometry

• Electronic

• Vibrational

• Rotational

• All

Energies required for the following transitions in increasing order

• P<Q<R<S

• Q<S<R<P

• S<R<Q<P

• P<S<R<Q

UV spectroscopy is useful for detection of................

• Functional group

• Extent of cojnjugation

• geometrical isomers

• all of these

Which of the following absorbs at more wavelength

• P) Benzene

• Q) Phenol

• R) Anilin

• S) Anilinium ion

Which of the following spectroscopy techniques is associated with molecular emission?

• UV-Visible spectroscopy

• IR spectroscopy

• Fluorescence spectroscopy

• X-ray diffraction

In the equation, A = ebc, what quantity is represented by "e"?

• Absorptivity

• Molar absorptivity

• Pathlength

• absorbance

Beer’s law states that the intensity of light decreases with respect to…..................

• Concentration

• thickness

• distance

• volume

Bathochromic shift is also known as

• Hypochromic shift    

• Blue shift   

• Red shift   

• Hypsochromic shift