Preparing for the Joint Entrance Exam (JEE) can be a daunting task. With so many subjects to cover and so many topics to study, it can be challenging to know where to start. One essential topic in the JEE Mains syllabus is the Nuclei. In this article, we will provide 50+ MCQ questions on the Nuclei, along with detailed solutions to help you prepare for the JEE Mains exam.
These 50+ MCQ questions are selected by the experts of studyrate.in and these are more difficult questions, which will help you to better understand Nuclei JEE Mains MCQ Questions with Answers.
Nuclei JEE Mains MCQ
The binding energy per nucleon is maximum for:
a) Deuterium
b) Uranium-235
c) Iron-56
d) Hydrogen-1
The nuclear reaction in which a nucleus is bombarded with neutrons resulting in the emission of protons is known as:
a) Nuclear fission
b) Nuclear fusion
c) Nuclear transmutation
d) Nuclear decay
The phenomenon of alpha decay involves the emission of:
a) Protons
b) Electrons
c) Neutrons
d) Helium nuclei
The half-life of a radioactive substance is 5 hours. If the initial quantity of the substance is 100 grams, the quantity remaining after 15 hours will be:
a) 25 grams
b) 12.5 grams
c) 6.25 grams
d) 3.125 grams
The ratio of the radii of two nuclei is 2:3. If the mass number of the larger nucleus is 27, the mass number of the smaller nucleus will be:
a) 8
b) 9
c) 12
d) 18
The phenomenon of nuclear fusion is responsible for the energy production in:
a) Stars
b) Nuclear reactors
c) X-ray machines
d) Geothermal power plants
The concept of the nuclear shell model was proposed by:
a) Ernest Rutherford
b) James Chadwick
c) Maria Goeppert-Mayer
d) Niels Bohr
The decay constant of a radioactive substance is 0.02 per day. The half-life of the substance is approximately:
a) 10 days
b) 20 days
c) 30 days
d) 40 days
The radii of two nuclei are in the ratio 3:4. If the mass number of the smaller nucleus is 16, the mass number of the larger nucleus will be:
a) 24
b) 32
c) 36
d) 48
The nuclear reaction in which two light nuclei combine to form a heavier nucleus is known as:
a) Alpha decay
b) Beta decay
c) Gamma decay
d) Nuclear fusion
The energy released in a nuclear fission reaction is mainly due to the conversion of:
a) Protons into neutrons
b) Electrons into positrons
c) Mass into energy
d) Neutrons into protons
The concept of nuclear force was introduced to explain the:
a) Stability of the atomic nucleus
b) Radioactive decay of nuclei
c) Emission of alpha particles
d) Fission of heavy nuclei
The activity of a radioactive substance is 800 disintegrations per minute. After 10 minutes, the activity will be:
a) 80 disintegrations per minute
b) 160 disintegrations per minute
c) 320 disintegrations per minute
d) 640 disintegrations per minute
The phenomenon of beta decay involves the emission of:
a) Protons
b) Electrons
c) Neutrons
d) Gamma rays
The radioactive isotope used for the dating of ancient fossils is:
a) Carbon-14
b) Uranium-238
c) Potassium-40
d) Thorium-232
The concept of nuclear spin was introduced to explain the:
a) Magnetic properties of atomic nuclei
b) Stability of the atomic nucleus
c) Radioactive decay of nuclei
d) Fission of heavy nuclei
The decay constant of a radioactive substance is 0.03 per day. The half-life of the substance is approximately:
a) 7 days
b) 14 days
c) 21 days
d) 28 days
The radiation emitted by a radioactive substance consists of:
a) Electrons
b) Protons
c) Neutrons
d) Alpha particles, beta particles, and gamma rays
The process of converting a stable nucleus into an unstable nucleus by bombarding it with high-energy particles is known as:
a) Nuclear fusion
b) Nuclear fission
c) Artificial transmutation
d) Natural transmutation
The radiation with the highest ionizing power among alpha particles, beta particles, and gamma rays is:
a) Alpha particles
b) Beta particles
c) Gamma rays
d) They all have the same ionizing power
The mass defect of a nucleus is a measure of the:
a) Stability of the nucleus
b) Binding energy of the nucleus
c) Radioactivity of the nucleus
d) Half-life of the nucleus
The concept of nuclear fission was experimentally demonstrated by:
a) Marie Curie
b) Enrico Fermi
c) Otto Hahn and Fritz Strassmann
d) James Chadwick
The radioactive decay of a substance follows:
a) First-order kinetics
b) Second-order kinetics
c) Zero-order kinetics
d) Random kinetics
The process of converting an unstable nucleus into a stable nucleus by the emission of radiation is known as:
a) Nuclear fusion
b) Nuclear fission
c) Artificial transmutation
d) Radioactive decay
The radioactive isotope used for the treatment of certain types of cancer is:
a) Cobalt-60
b) Uranium-235
c) Technetium-99m
d) Polonium-210
The phenomenon of gamma decay involves the emission of:
a) Electrons
b) Protons
c) Neutrons
d) Gamma rays
The half-life of a radioactive substance is 10 minutes. If the initial quantity of the substance is 200 grams, the quantity remaining after 30 minutes will be:
a) 12.5 grams
b) 25 grams
c) 50 grams
d) 100 grams
The process by which a heavy nucleus splits into two smaller nuclei with the release of a large amount of energy is called:
a) Nuclear fusion
b) Nuclear fission
c) Alpha decay
d) Beta decay
The activity of a radioactive substance is 1000 disintegrations per minute. After 20 minutes, the activity will be:
a) 500 disintegrations per minute
b) 250 disintegrations per minute
c) 125 disintegrations per minute
d) 62.5 disintegrations per minute
The radii of two nuclei are in the ratio 5:8. If the mass number of the smaller nucleus is 9, the mass number of the larger nucleus will be:
a) 14
b) 18
c) 24
d) 40
We hope there JEE MCQ of Class 12 Nuclei will help you to score an excellent rank in JEE Mains and Advanced. If you have any queries feel free to write in the comments section. We at Study Rate are always ready to serve our students.
