29/03/2020 Quantum Physics(Senior Class Physics Study by Topics) 29/03/2020 0Comments by Gate Academy Welcome to your Quantum Physics(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. There are ___ types of quantum numbers. 4 7 2 5 2. Heisenberg’s Uncertainty Principle states that the ___ and ___ of an electron cannot be known simultaneously. Position, momentum Position, charge Position, mass Momentum, speed 3. The magnetic quantum number describes the: Shape of the orbital. Spatial orientation of the orbital. Number of electrons. Average distance of the most electron-dens regions from the nucleus. 4. The angular momentum quantum number is related to n by ___, and describes: (n-1), the spatial orientation of the molecule (n+1), the spatial orientation of the molecule (n+1), the shape of the orbital (n-1), the shape of the orbital 5. The spin quantum number (ms) can have a value of: -1/2, -3/2 -1/2, +1/2 +1, -1 0, +1 6. Who discovered the photoelectric effect? Micheal Faraday Isaac Newton Hertz Heinrich Hertz 7. The emission of electron from the surface of a metal is called? Compton The photoelectric effect X-ray Spectra Blackbody Radiation 8. Quantum physics explains the interaction between? Matter and energy Energy Atomic and Molecules Energy and Nuclear 9. The quantum mechanical model describes electrons as: Waves Particles Particles with wave-like properties Small, hard spheres 10. The momentum and the position of a particle cannot simultaneously be measured with complete certainty, is based on what assumption? Plank's theory Relativity Theory The uncertainty principle Particle duality 11. A wavefunction: 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 electron. Is the differential equation used to describe the structure of an atom. 12. The energy required by an electron to escape from the surface of a given metal is called? The photoelectric effect Threshold frequency Work Function Threshold Effect 13. The ability of an object in quantum theory to be in more than one quantum state at the same is know as? Wave-particle duality Superposition Decoherence Nonlocality 14. 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? λf = λc λi > λf λi < λf λi = λc 15. 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 III I II IV 16. Which of the following laws was the first quantum theory in physics? Uncertainty Principle Lewi's Law Planck's Law Faraday's Law 17. Who predicted that matter acts as a wave? Heinrich Hertz Rutherford Heisberg Louis de Broglie 18. 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-rays The particle nature of the electron. The wave nature of the electron The nuclear model of the atom. 19. Quantum mechanics is called the science of what? The very small The colossal The very large The big 20. The different types of subshells and corresponding number of orbitals is: N:1, l:0, m:0 S:1, p:3, d:5, f:7 S:7, p:5, d:3, f:1 S:2, p:6, d:10, f:14 21. The principle quantum number is related to: The shape of the orbital The spatial orientation of the orbital The average distance of the most electron-dense regions from the nucleus The number of electrons 22. The electromagnetic radiation emitted from the surface of an object due to the object's internal energy is known as? Spectra Emission Thermal Radiation Photon Nuclear Radiation 1 out of 22 Time is Up! Time's up
