Ch12 Atom NCERT Board MCQ Part 2 скачать в хорошем качестве

Ch12 Atom NCERT Board MCQ Part 2

Ch12 Atom NCERT Board MCQ Part 2: Class 12 Physics | Chapter 12 – Atoms | MCQ Series (Part 2) Welcome back to the MCQ practice series! In this video, we cover important multiple-choice questions from Chapter 12: Atoms, designed to help you strengthen concepts and score full marks in board exams. What’s Inside: ✔️ Concept-based MCQs ✔️ Previous year–style questions ✔️ Step-by-step explanations ✔️ Quick tricks to solve numerical MCQs ✔️ Perfect revision for boards & competitive exams Useful for: – Class 12 Board Exam Preparation – NEET / JEE Foundation – Quick Concept Revision Keywords: Class 12 Physics Atoms MCQ, Atoms MCQ Part 2, NCERT Class 12 Physics Chapter 12, Atoms important questions, Class 12 Physics board preparation, Atoms NCERT MCQ solutions, Class 12 Physics MCQ series, CBSE Class 12 Atoms questions, Atoms previous year questions, Physics MCQ for boards, Atoms class 12 revision, Class 12 Physics chapter wise MCQ Hashtags: #Class12Physics #AtomsClass12 #PhysicsMCQ #NCERTPhysics #CBSEBoardExam #Class12Preparation #AtomsMCQ #BoardExam2025 #ScienceMCQ #NCERTClass12 #StudyWithMe #JEEPreparation #neetpreparation Timestamps: 00:00 Question-21 The ratio of the speed of the electrons in the ground state of hydrogen to the speed of light in vacuum is 00:37 Question-22 Which of the following is not correct about Bohr’s model of the hydrogen atom? 01:32 Question-23 Pastchen series of atomic spectrum of hydrogen gas lies in 02:31 Question-24 For the ground state, the electron in the H-atom has an angular momentum = L, according to the simple Bohr model. Angular momentum is a vector and hence there will be infinitely many orbits with the vector pointing in all possible 02:30 Question-25 The wavelength present in the P-fund series of spectral lines lies in which part of EM spectrum 03:08 Question-26 The diagram shows the energy levels for an electron in a certain atom. Which transition shown represents the emission of a photon with the most energy? 04:56 Question-27 O2 molecule consists of two oxygen atoms. In the molecule, nuclear force between the nuclei of the two atoms 05:49 Question-28 In a Geiger-Marsden experiment, find the distance of closest approach to the nucleus of a 7.7 MeV -particle before it comes momentarily to rest and reverses its direction 07:43 Question-29 Which of the following spectral lines of hydrogen atom is lying in visible EM spectrum? 08:00 Question-30 In the following transitions of the hydrogen atom, the one which gives an absorption line of highest frequency is 09:18 Question-31 If an electron in hydrogen atom is revolving in circular track of radius 5.3 x 10-11 m with a velocity of 2.2 x 106 m/s around the proton then the frequency of electron moving around the proton is 10:30 Question-32 Suppose an electron is attracted towards the origin by a force k/r, where k is a constant and r is the distance of the electron from the origin. By applying Bohr model to this system, the radius of nth orbit of the electron is found to be rn and the kinetic energy of the electron is found to be Tn . Then which of the following is true? 12:52 Question-33 The wavelength of the first line of Lyman series in hydrogen is 1216 Å. The wavelength of the second line of the same series will be 14:31 Question-34 The Rydberg formula, for the spectrum of the hydrogen atom where all terms have their usual meaning is 17:22 Question-35 Which of the following spectral series or hydrogen atom is lying in UV EM Spectrum? 17:38 Question-36 Two H atoms in the ground state collide inelastically. The maximum amount by which their combined kinetic energy is reduced is 19:11 Question-37 In which of the following systems will the radius of the first orbit n = 1 be minimum? 19:58 Question-38 de-Broglie wavelength of an electron in the first Bohr orbit is 21:31 Question-39 When an electron in an atom goes from a lower to a higher orbit, its 22:17 Question-40 An electron in a hydrogen atom makes a transition from n = n1 to n = n2 . The time period of the electron in the initial state is eight times that in the final state. The possible values of n1 and n2 are