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More often than not, the CBSE Important Questions Ch 12 Class Physics is given special attention, and it's not hard to see why; Physics is a branch of science that envelops a deep comprehension of the cosmos. It encompasses the nature of matter on an atomic scale, its composition, its structures, the hydrogen spectra, Bohr’s atomic model, energy levels, and more.
This groundwork is crucial for a deeper understanding of modern physics and quantum mechanics as well as other branches of atomic physics. Understanding the Atoms Class 12 Important Questions 2025 will be beneficial in board exams and other competitive examinations like JEE, NEET, etc. This guide structures atoms important questions for class 12, suggests prescriptions, elucidates the more critical questions, and further explains why they matter.
PREMIUM EDUCART QUESTIONS
(Important Questions of this Chapter from our 📕)
In the table given below, we have provided the links to Atoms Chapter Class 12 Physics Important Questions PDFs. You can download them without having to share any login info.
Before moving to the atom's important questions, it is vital to understand the key areas discussed in this chapter:
Postulates of Bohr's ModelEnergy levels and orbitsQuantisation of angular momentum
Emission and Absorption SpectraHydrogen Spectrum Series: Lyman, Balmer, Paschen, Brackett, and Pfund
Here are some of the most important questions of physics you should practice:
Question 1:
An electron in the Bohr model atom is in the nth orbit of radius r and has kinetic energy KE. Which of the following statements does not comply with the postulate of Bohr’s model of the atom?
A. Radius of the orbit in terms of de Broglie wavelength is given as nλ/2π.
B. In going from a lower to a higher orbit, both PE and TE increase, but KE decreases.
C. If KE = 3.4 eV, the corresponding potential energy PE is 6.8 eV and Total Energy TE is 10.2 eV.
D. If the ionisation potential of the given Bohr model atom is 13.6 V, the energy required to remove the electron from its second orbit is 3.4 eV.
Question 2:
Particles like electrons, protons, and alpha particles can be used to ionise hydrogen atoms. If the ionisation energy of a hydrogen atom is Ei and all these Striking particles carry the same kinetic energies, then determine which of these particles will be most effective in ionising the hydrogen atom? Assume that the collisions are perfectly inelastic, and it’s the excess KE that is used for ionisation.
Question 3:
An ultraviolet radiation falls on an H atom.
(a) If the H atom is in the ground state when the incident photon of wavelength 80 nm falls on it; will the H atom get excited to the higher energy levels? OR will the H atom get ionised? Justify your answer.
(b) Post your answer to part (a). Determine EITHER the quantum number of the energy level to which the H atom gets excited OR determine the KE of the electron emitted out of the H atom. Use the value of hc = 1240 eV‐nm.
Though it might appear to be tedious for you to prepare for a particular examination, prioritisation of important questions for physics should help improve mastery of concepts. This is the reason why:
Exam Emphasis:
There exists an overwhelming corresponding value of atoms in both the board examinations as well as other competitive exams. One can expect this subject to contribute positively in terms of the percentage of marks gained.
Building Block to Higher Concepts:
Before diving into potentially complex subjects of quantum mechanics, first, you will have to grasp a thorough understanding of atomic structure with the same level of detail that atomic physics requires.
Increases Problem Solving Ability:
Engagement with much more diversity in one’s calculations and focusing on solving concepts brings one to improve one’s cognitive abilities.
Practical Uses:
Terms such as X-ray, transitional electron, and spectral lines have exceptional relevance and significance to branches of study like medicine and aid many industries and fields of research.
Future Examination Readiness:
The topics covered in this section stand a high chance of being featured in the JEE, NEET, and other entry examinations.
The atoms important question for chapter 12 will always help to have crucial questions formulated, but their utility is in formulating a strategic plan that makes them answerable when dealing with the Atoms chapter. Understand this.
Enhance and Invest in Comprehension:
It all starts with understanding the ideas. Go through the NCERT book and other texts. Take notes and highlight critical aspects.
Concentrate on Derivations and Formulas:
Achieve mastery over the derivations, one confident step at a time. Make multiple copies of the formula sheet for easy reference.
Work on Numerical Problems:
Increase the variety of numerical problems you work on to improve accuracy and speed. Practice using past examination papers.
Revise with Brief Notes and Flash Cards:
Summarise the crucial concepts, formulas, and diagrams while making notes. Key concepts can be imprinted on flashcards for easy access and rapid revision.
Work on Mock Tests and Sample Papers:
From time to time, try to take mock tests in conditions that are similar to the real exam.Go through your answers to see which areas need improvement.
Understand the Concepts:
Diagrams are great for understanding atomic structures and models as well as spectral lines. Educational videos on the topic can clarify more complex concepts.
Consult Teachers or Fellow Students:
Students often deal with similar problems, so talking to them can provide answers to doubts while also conveying different ideas. Seek help from lecturers for concepts that are hard to understand.
Make Use of Web-Based Resources:
Check online for tutorials, animations, and other interactive activities that explain the concept better.
Students must grasp the concept of the atomic structure and its workings to get good marks in these examinations. Hence, CBSE Important Questions Ch 12 Class 12 Physics are of great significance. These atomic vital questions of physics will go a long way towards helping you comprehend the ideas as well as derive and calculate them and strengthen the foundation of higher learning in physics. These methods will assist in understanding the subject and scoring highly in the final examinations and other competitive examinations. Understand all the nuclear intricacies and delve into the examination of the microcosm that commands the macrocosm. Have an interesting time learning!
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