29/03/2020Quantum Physics(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Quantum Physics(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. The quantum mechanical model describes electrons as:ParticlesSmall, hard spheresParticles with wave-like propertiesWaves2. The principle quantum number is related to:The shape of the orbitalThe spatial orientation of the orbitalThe average distance of the most electron-dense regions from the nucleusThe number of electrons3. The ability of an object in quantum theory to be in more than one quantum state at the same is know as?SuperpositionNonlocalityWave-particle dualityDecoherence4. Quantum mechanics is called the science of what?The colossalThe very smallThe very largeThe big5. A wavefunction:Is the differential equation used to describe the structure of an electron.Is the solution to a differential equation known as a wave equation that describes the structure of an atom.Is the solution to a differential equation known as a wave equation that describes the structure of an electron.Is the differential equation used to describe the structure of an atom.6. The magnetic quantum number describes the:Average distance of the most electron-dens regions from the nucleus.Number of electrons.Shape of the orbital.Spatial orientation of the orbital.7. The electromagnetic radiation emitted from the surface of an object due to the object's internal energy is known as?Nuclear RadiationPhotonSpectra EmissionThermal Radiation8. Who predicted that matter acts as a wave?HeisbergRutherfordHeinrich HertzLouis de Broglie9. Quantum physics explains the interaction between?Atomic and MoleculesEnergyEnergy and NuclearMatter and energy10. When electrons of suitable energy travel through a thin layer of graphite, a pattern of concentric circles is produced on a screen.The production of this pattern is evidence forThe nuclear model of the atom.The particle nature of the electron.The existence of X-raysThe wave nature of the electron11. The angular momentum quantum number is related to n by ___, and describes:(n-1), the spatial orientation of the molecule(n-1), the shape of the orbital(n+1), the shape of the orbital(n+1), the spatial orientation of the molecule12. Who discovered the photoelectric effect?Micheal FaradayHeinrich HertzIsaac NewtonHertz13. The spin quantum number (ms) can have a value of:-1/2, -3/20, +1-1/2, +1/2+1, -114. Heisenberg’s Uncertainty Principle states that the ___ and ___ of an electron cannot be known simultaneously.Position, chargePosition, momentumPosition, massMomentum, speed15. An α-particle having a de Broglie wavelength λi collides with a stationary carbon nucleus. The α-particle moves off in a different direction as shown below.After the collision, the de Broglie wavelengths of the α-particle and the carbon nucleus are λf and λc respectively. Which of the following is a true statement related to the de Broglie wavelengths?λi = λcλi > λfλi < λfλf = λc16. Which one of the following best shows the variation with kinetic energy E of the de Broglie wavelength λ associated with a particle?IIIIIIIVIIIIVIII17. The different types of subshells and corresponding number of orbitals is:S:2, p:6, d:10, f:14S:1, p:3, d:5, f:7S:7, p:5, d:3, f:1N:1, l:0, m:018. The emission of electron from the surface of a metal is called?The photoelectric effectBlackbody RadiationX-ray SpectraCompton19. Which of the following laws was the first quantum theory in physics?Planck's LawUncertainty PrincipleLewi's LawFaraday's Law20. There are ___ types of quantum numbers.745221. The energy required by an electron to escape from the surface of a given metal is called?Threshold EffectThreshold frequencyWork FunctionThe photoelectric effect22. The momentum and the position of a particle cannot simultaneously be measured with complete certainty, is based on what assumption?The uncertainty principlePlank's theoryRelativity TheoryParticle duality23 out of 22Time is Up!