Physical Chemistry II test I new

Unit of specific conductance____.

• S cm

• S cm⁻¹

• S cm² mol⁻¹

• S mol⁻¹

Instrument used for measuring equivalent conductance

• Wheatstone bridge

• Kohlrausch’s bridge

• Potentiometer

• Galvanometer

A reversible cell is one where the reaction

• Proceeds only in one direction

• Can be reversed by external potential

• Involves combustion

• Is always irreversible

EMF of a cell is calculated using

• Faraday’s laws

• Nernst equation

• Boyle’s law

• Charles’ law

The diagram representing different energy transitions in a molecule is called

• Jablonski diagram

• Ellingham diagram

• Frost diagram

• Pourbaix diagram

The Stark-Einstein law states that

• One photon excites one molecule

• Light intensity decreases exponentially

• A reaction must absorb light to occur

• Fluorescence occurs in all molecules

The electromagnetic spectrum consists of regions classified based on

• Density

• Temperature

• Pressure

• Wavelength

The microwave region of the electromagnetic spectrum is used to study

• Vibrational spectra

• Rotational spectra

• Electronic spectra

• Nuclear spectra

Rayleigh scattering occurs when photons are scattered with

• No interaction with molecules

• Higher energy than incident light

• Lower energy than incident light

• No change in energy

Raman scattering involves

• Inelastic scattering of photons

• Elastic scattering of photons

• Absorption of photons

• Emission of photons