Practice BITSAT Physics Nuclei MCQs provided below. The MCQ Questions for Full Syllabus Nuclei Physics with answers and follow the latest BITSAT/ NCERT and KVS patterns. Refer to more Chapter-wise MCQs for BITSAT Full Syllabus Physics and also download more latest study material for all subjects
MCQ for Full Syllabus Physics Nuclei
Full Syllabus Physics students should review the 50 questions and answers to strengthen understanding of core concepts in Nuclei
Nuclei MCQ Questions Full Syllabus Physics with Answers
Question: After two hours, one-sixteenth of the starting amount of a certain radioactive isotope remained undecayed. The half life of the isotope is
- a) 15 minutes
- b) 30 minutes
- c) 45 minutes
- d) 4 hours
Answer: 30 minutes
Question: When 92U235 undergoes fission, 0.1% of its original mass is changed into energy. How much energy is released if 1 kg of 92U235 undergoes fission?
- a) 9 × 1010 J
- b) 9 × 1011 J
- c) 9 × 1012 J
- d) 9 × 1013 J
Answer: 9 × 1013 J
Question: A radioactive element X converts into another stable element Y. Half life of X is 2 hrs. Initially only X is present. After time t, the ratio of atoms of X and Y is found to be 1 : 4, then t in hours is
- a) 2
- b) 4
- c) between 4 and 6
- d) 6
Answer: between 4 and 6
Question: The mass of 7N15 is 15.00011 amu, mass of 8O16 is 15.99492 amu and mP = 1.00783 amu. Determine binding energy of last proton of 8O16
- a) 2.13 MeV
- b) 0.13 MeV
- c) 10 MeV
- d) 12.13 MeV
Answer: 12.13 MeV
Question: In an ore containing uranium, the ratio of U238 to Pb206 is 3. Calculate the age of the ore, assuming that all the lead present in the ore is the final stable product of U238. Take the halflife of U238 to be 4.5 × 109 yr.
- a) 1.6 × 193 yr
- b) 1.5 × 104 yr
- c) 1.867 × 109 yr
- d) 2 × 105 yr
Answer: 1.867 × 109 yr
Question: A nucleus of uranium decays at rest into nuclei of thorium and helium. Then :
- a) The helium nucleus has less momentum than the thorium nucleus
- b) The helium nucleus has more momentum than the thorium nucleus
- c) The helium nucleus has less kinetic energy than the thorium nucleus
- d) The helium nucleus has more kinetic energy than the thorium nucleus
Answer: The helium nucleus has more kinetic energy than the thorium nucleus
Question: Boron rods in a nuclear reactor are used to
- a) Absorb excess neutrons
- b) Absorb alpha particle
- c) Slow down the reaction
- d) Speed up the reaction
Answer: Absorb excess neutrons
Question: A mixture consists of two radioactive materials A1 and A2 with half lives of 20 s and 10 s respectively. Initially the mixture has 40 g of A1 and 160 g of A2. The amount of the two in the mixture will become equal after
- a) 60 s
- b) 80 s
- c) 20 s
- d) 40 s
Answer: 40 s
Question: If the total binding energies of 
nuclei are 2.22, 28.3, 492 and 1786 MeV respectively, identify the most stable nucleus of the following
- a)
- b)
- c)
- d)
Answer:
Question: Which one is correct about fission?
- a) Approx. 0.1% mass converts into energy
- b) Most of energy of fission is in the form of heat
- c) In a fission of U235 about 200 eV energy is released
- d) On an average, one neutron is released per fission of U235
Answer: Approx. 0.1% mass converts into energy
Question: Which of the following is best nuclear fuel
- a) thorium 236
- b) plutonium 239
- c) uranium 236
- d) neptunium 239
Answer: plutonium 239
Question: The activity of a radioactive sample is measured as N0 counts per minute at t = 0 and N0/e counts per minute at t = 5 minutes. The time (in minutes) at which the activity reduces to half its value is
- a) loge 2 / 5
- b)
- c) 5 log 102
- d) 5 loge 2
Answer: 5 loge 2
Question: Nuclear energy is released in fission since binding energy per nucleon is
- a) Sometimes larger and sometimes smaller
- b) Larger for fission fragments than for parent nucleus
- c) Same for fission fragments and nucleus
- d) Smaller for fission fragments than for parent nucleus
Answer: Larger for fission fragments than for parent nucleus
Question: The binding energy of the innermost electron tungsten is 40 keV. To produce characteristic Xrays using a tungsten target in an X-ray tube the potential difference V between the cathode and the anticathode should be-
- a) V < 40 kV
- b) V ≤4 kV
- c) V > 40 kV
- d) V > / < 40 kV
Answer: V > 40 kV
Question: A radioactive nucleus undergoes a series of decay according to the scheme 
If the mass number and atomic number of ‘A’ are 180 and 72 respectively, then what are these numbers for A4
- a) 172 and 69
- b) 174 and 70
- c) 176 and 69
- d) 176 and 70
Answer: 172 and 69
Question: Half life of a radioactive substance is 20 minute. Difference between points of time when it is 33% disintegrated and 67% disintegrated is approximately
- a) 40 minute
- b) 10 minute
- c) 15 minute
- d) 20 minute
Answer: 20 minute
Question: The Binding energy per nucleon of 
and 
nuclei are 5.60 MeV and 7.06 MeV, respectively. In the nuclear reaction 
the value of energy Q released is :
- a) 19.6 MeV
- b) – 2.4 MeV
- c) 8.4 MeV
- d) 17.3 MeV
Answer: 17.3 MeV
Question: A nucleus of uranium decays at rest into nuclei of thorium and helium. Then :
- a) The helium nucleus has less momentum than the thorium nucleus
- b) The helium nucleus has more momentum than the thorium nucleus
- c) The helium nucleus has less kinetic energy than the thorium nucleus
- d) The helium nucleus has more kinetic energy than the thorium nucleus
Answer: The helium nucleus has more kinetic energy than the thorium nucleus
Question: Boron rods in a nuclear reactor are used to
- a) Absorb excess neutrons
- b) Absorb alpha particle
- c) Slow down the reaction
- d) Speed up the reaction
Answer: Absorb excess neutrons
Question: Which of the following is best nuclear fuel
- a) thorium 236
- b) plutonium 239
- c) uranium 236
- d) neptunium 239
Answer: plutonium 239
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Important Practice Resources for BITSAT Physics s
MCQs for Nuclei Physics Full Syllabus
Students can use these MCQs for Nuclei to quickly test their knowledge of the chapter. These multiple-choice questions have been designed as per the latest syllabus for Full Syllabus Physics released by BITSAT. Our expert teachers suggest that you should practice daily and solving these objective questions of Nuclei to understand the important concepts and better marks in your school tests.
Nuclei NCERT Based Objective Questions
Our expert teachers have designed these Physics MCQs based on the official NCERT book for Full Syllabus. We have identified all questions from the most important topics that are always asked in exams. After solving these, please compare your choices with our provided answers. For better understanding of Nuclei, you should also refer to our NCERT solutions for Full Syllabus Physics created by our team.
Online Practice and Revision for Nuclei Physics
To prepare for your exams you should also take the Full Syllabus Physics MCQ Test for this chapter on our website. This will help you improve your speed and accuracy and its also free for you. Regular revision of these Physics topics will make you an expert in all important chapters of your course.
You can get most exhaustive BITSAT Physics Nuclei MCQs for free on StudiesToday.com. These MCQs for Full Syllabus Physics are updated for the 2025-26 academic session as per BITSAT examination standards.
Yes, our BITSAT Physics Nuclei MCQs include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the BITSAT paper is now competency-based.
By solving our BITSAT Physics Nuclei MCQs, Full Syllabus students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Physics.
Yes, Physics MCQs for Full Syllabus have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused BITSAT exams.
Yes, you can also access online interactive tests for BITSAT Physics Nuclei MCQs on StudiesToday.com as they provide instant answers and score to help you track your progress in Physics.