NCERT Class 12 Physics Chapter 5 Nuclei Test Mock Test
This free online test covers Chapter 5, Nuclei, from the NCERT Class 12 Physics Part II textbook. The 28 questions are written directly from the chapter — definitions, processes, worked examples and the points the book italicises — so a score here tells you how much of the chapter actually stuck, not how well you guess. Each answer carries an explanation that says why the right option is right and why the other three fail, which is where most of the learning happens. Attempt it after your first read of the chapter, then again before the exam. There is no negative marking, and you can review the full solution the moment you submit.
Duration
28 mins
Questions
28 MCQs
Total Marks
28 pts
Negative
0 per wrong
Topics Covered in This Paper
Sample Questions
Q1.The radius of a nucleus is smaller than that of an atom by a factor of about 10^4. It follows that the volume of the nucleus is about:
- A10^-12 times the volume of the atom, and holds a correspondingly small fraction of the mass
- B10^-12 times the volume of the atom, though it holds more than 99.9 per cent of the atom's mass
- C10^-4 times the volume of the atom, and holds about 99.9 per cent of the atom's mass
- D10^-8 times the volume of the atom, and holds half of the atom's mass
Q2.The atomic mass unit is defined as:
- AThe mass of one atom of hydrogen, equal to 1.00783 x 10^-27 kg
- BOne twelfth of the mass of one atom of carbon-12, equal to 1.660539 x 10^-27 kg
- CThe mass of one proton, equal to 1.67262 x 10^-27 kg
- DOne twelfth of the mass of one atom of oxygen-16
Q3.Chlorine has two isotopes of masses 34.98 u and 36.98 u with relative abundances of 75.4 and 24.6 per cent. Its atomic mass of about 35.47 u is obtained as:
- AThe weighted average of the two isotopic masses according to their abundances
- BThe simple arithmetic mean of the two isotopic masses
- CThe sum of the two isotopic masses divided by the number of protons
- DThe mass of the more abundant isotope alone
Before you begin
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Disclaimer: The questions provided here are extracted and digitized from previous year papers using automated processes. They may contain typographical errors, formatting issues, or minor variations from the actual examination paper. While we have done our best to verify the accuracy of the official answer keys, discrepancies may occasionally exist. Please refer to the official commission website for the most authentic paper.
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FAQ
Frequently asked questions
Frequently Asked Questions
- How many questions are in the NCERT Class 12 Physics Chapter 5 Nuclei Test mock test?
- This paper has 28 multiple-choice questions carrying 28 marks in total, to be attempted in 28 minutes.
- Is the NCERT Class 12 Physics Chapter 5 Nuclei Test mock test free to attempt?
- Yes. You can attempt the full paper online for free on AI Test Planet, and see your score and correct answers immediately after submitting.
- Does this paper have negative marking?
- No, there is no negative marking on this paper, so an attempted guess costs you nothing.
- Are solutions and explanations available?
- Yes. After you submit, every question shows the correct answer with a step-by-step explanation, along with a topic-wise breakdown of your performance.