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Daily Practice Problems
Class 12 Physics
Nuclei
daily practice problem

Question 1:

A radioactive nucleus emits a beta particle, then the parent and daughter nuclei are

(a) isotones

(b) isotopes

(c) isomers

(d) isobars

 

Question 2:

Sun’s radiant energy is due to

(a) nuclear Fusion

(b) nuclear Fission

(c) photoelectric Effect

(d) radioactive Decay

 

Question 3:

The discovery of Neutron is done by:

(a) J.J Thomson

(b) James Chadwick

(c) both

(d) none

 

Question 4:

Nuclides with same neutron number N but different atomic number Z is known as __________.

(a) isotopes

(b) isobars

(c) isotones

(d) none

 

Question 5:

The commonly used moderator in nuclear reactor is __________.

(a) graphite

(b) water

(c) D2O

(d) all of these

 

Question 6:

Define the term ‘activity’ of a radionuclide. Write its SI unit.

 

Question 7:

Heavy water is often used as a moderator in thermal nuclear reactors? Give reason.

 

Question 8:

Why is the ionizing power of α- particle greater than that of gamma rays?

 

Question 9:

The radioactive isotope D decays according to the sequence.

If the mass number and atomic number of D2 are 176 and 71 respectively, what is (i)the mass number (ii)atomic number of D?

                       

Question 10:

Why is a neutron most effective as a bullet in nuclear reaction?

 

Question 11:

What is the activity of one gram of 22688 Ra, whose half-life is 1622 years?

 

Question 12:

Draw a graph showing the variation of decay rate with a number of active nuclei.

 

Question 13:

If both the number of neutrons and the number of protons is conserved in each nuclear reaction, in what way is mass converted into energy (or vice versa) in a nuclear reaction? Explain.

 

Question 14:

Two radioactive samples, X, Y have the same number of atoms at t = 0. Their half-lives are 3 h and 4 h respectively. Compare the rates of disintegration of the two nuclei after 12 hours.

 

Question 15:

Why is the energy of the beta particles emitted during beta decay continuous?

 

Question 16:

A nucleus with A= 235 splits into two new nuclei whose mass number are in the ratio of 2:1. Find the radii of the new nuclei. (Consider the value of R0= 1.4 fm)

Question 17:

You are given two nuclei 73X and 43Y. Explain giving reasons, as to which one of the two nuclei is likely to be more stable?

 

Question 18:

Distinguish between Nuclear fission and nuclear fusion.

 

Question 19:

The half-life of 23892 U against α-decay is 4.5 × 109 years. Calculate the activity of 1g sample of 23892U.

 

Question 20:

A general impression exist that mass-energy interconversion takes place only in nuclear reaction and never in chemical reaction. This is strictly speaking, incorrect. Explain.

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  1. Application of Knowledge: Problem-solving allows you to apply the theoretical concepts of the topic Class 12 Physics Nuclei you have learned to real-life situations. It helps you bridge the gap between abstract knowledge and practical scenarios, making the learning more relevant and meaningful.
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In summary, problem-solving after learning a theoretical concept on CBSE Nuclei Class 12 Physics is an essential part of the learning process. It enhances your understanding, critical thinking abilities, and retention of knowledge. Moreover, it equips you with valuable skills that are applicable in academic, personal, and professional contexts.

You must have heard of the phrase “Practice makes a man perfect”. Well, not just a man, practice indeed enhances perfection of every individual.

Practicing questions plays a pivotal role in achieving excellence in exams. Just as the adage goes, "Practice makes perfect," dedicating time to solve a diverse range of exam-related questions yields manifold benefits. Firstly, practicing questions allows students to familiarize themselves with the exam format and types of problems they might encounter. This familiarity instills confidence, reducing anxiety and improving performance on the actual exam day. Secondly, continuous practice sharpens problem-solving skills and enhances critical thinking, enabling students to approach complex problems with clarity and efficiency. Thirdly, it aids in identifying weak areas, allowing students to focus their efforts on improving specific topics. Moreover, practice aids in memory retention, as active engagement with the material reinforces learning. Regular practice also hones time management skills, ensuring that students can allocate appropriate time to each question during the exam. Overall, practicing questions not only boosts exam performance but also instills a deeper understanding of the subject matter, fostering a holistic and effective learning experience.

All About Daily Practice Problems on Class 12 Physics Nuclei NCERT Chapter 13

Our Daily Practice Problems (DPPs) offer a diverse range of question types, including Multiple Choice Questions (MCQs) as well as short and long answer types. These questions are categorized into Easy, Moderate, and Difficult levels, allowing students to gradually progress and challenge themselves accordingly. Additionally, comprehensive solutions are provided for each question, available for download in PDF format - Download pdf solutions as well as Download pdf Questions. This approach fosters a holistic learning experience, catering to different learning styles, promoting self-assessment, and improving problem-solving skills. With our well-structured DPPs, students can excel in exams while gaining a deeper understanding of the subject matter. Hope you found the content on Class 12 Physics Nuclei NCERT Chapter 13 useful.

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