WorksheetsPhysical Chemistry II test I new
Total questions: 20
Worksheet time: 10mins
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
According to Arrhenius theory, an acid___.
Accepts H⁺
Donates OH⁻
Increases H⁺ concentration
Decreases H⁺ concentration
Limitation of Arrhenius theory_____.
Does not explain non-aqueous solutions
Cannot explain weak electrolytes
Does not define acids and bases in gases
All of the above
The solubility product (Ksp) is related to____.
Precipitation
Redox potential
Electrode reactions
Corrosion
The most probable electronic transition in UV spectroscopy is_____.
n → π*
σ → σ*
n → σ*
π →π*
The splitting of NMR signals follows the____.
2n-1 rule
2n+1 rule
n-1 rule
n+1 rule
Example of a strong electrolyte____.
NaCl
CH₃COOH
NH₄OH
H₂O
The force constant of a bond is determined from____.
Vibrational frequency
Rotational energy
UV absorption
Nuclear spin
The unit of electromotive force (EMF) is____.
Ampere
Ohm
Coulomb
Volt
Shielding in NMR occurs due to
Electron density around the nucleus
Strong external magnetic fields
Absence of electrons
Low molecular weight
Deshielding causes a chemical shift
Downfield (higher δ value)
Upfield (lower δ value)
No change in δ value
Increase in peak intensity
