29/03/2020 Quantum 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. Quantum mechanics is called the science of what? The bigThe colossalThe very largeThe very small2. The energy required by an electron to escape from the surface of a given metal is called?Threshold EffectThe photoelectric effectThreshold frequencyWork Function3. Who predicted that matter acts as a wave?Heinrich HertzHeisbergRutherfordLouis de Broglie4. The momentum and the position of a particle cannot simultaneously be measured with complete certainty, is based on what assumption?Particle dualityRelativity TheoryThe uncertainty principlePlank's theory5. Quantum physics explains the interaction between?Atomic and MoleculesEnergyEnergy and NuclearMatter and energy6. The emission of electron from the surface of a metal is called?ComptonThe photoelectric effectBlackbody RadiationX-ray Spectra7. The angular momentum quantum number is related to n by ___, and describes:(n-1), the shape of the orbital(n+1), the spatial orientation of the molecule(n+1), the shape of the orbital(n-1), the spatial orientation of the molecule8. Heisenberg’s Uncertainty Principle states that the ___ and ___ of an electron cannot be known simultaneously.Momentum, speedPosition, massPosition, momentumPosition, charge9. The magnetic quantum number describes the:Average distance of the most electron-dens regions from the nucleus.Spatial orientation of the orbital.Shape of the orbital.Number of electrons.10. The different types of subshells and corresponding number of orbitals is:S:1, p:3, d:5, f:7S:7, p:5, d:3, f:1N:1, l:0, m:0S:2, p:6, d:10, f:1411. Which one of the following best shows the variation with kinetic energy E of the de Broglie wavelength λ associated with a particle?I II III IV IIIIIVII12. 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 = λc13. Which of the following laws was the first quantum theory in physics?Planck's LawFaraday's LawLewi's LawUncertainty Principle14. The spin quantum number (ms) can have a value of: +1, -1-1/2, -3/2-1/2, +1/20, +115. Who discovered the photoelectric effect?Heinrich HertzIsaac NewtonHertzMicheal Faraday16. The ability of an object in quantum theory to be in more than one quantum state at the same is know as?SuperpositionNonlocalityWave-particle dualityDecoherence17. The principle quantum number is related to:The spatial orientation of the orbitalThe shape of the orbitalThe average distance of the most electron-dense regions from the nucleusThe number of electrons18. 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 for The existence of X-raysThe particle nature of the electron.The wave nature of the electronThe nuclear model of the atom.19. There are ___ types of quantum numbers.524720. The electromagnetic radiation emitted from the surface of an object due to the object's internal energy is known as?Spectra EmissionNuclear RadiationThermal RadiationPhoton21. A wavefunction: Is the solution to a differential equation known as a wave equation that describes the structure of an atom.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 electron.Is the differential equation used to describe the structure of an atom.22. The quantum mechanical model describes electrons as:Particles with wave-like propertiesWavesSmall, hard spheresParticles23 out of 22Time is Up!