Radioactivity MCQs for NEET

NEET  Physics is the scoring paper in the medical entrance examination. Here, you will discover the NEET Physics MCQ Questions for all Concepts as per the latest syllabus. Practice more on a regular basis with these NEET Physics objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. NEET Physics Radioactivity Multiple Choice Questions make you feel confident in answering the question in the exam & increases your scores to high.

MCQs on Radioactivity

1. The neutral atoms of all isotopes of the same element contain the same number of __________.
(a) neutrons only.
(b) Electrons
(c) Mass numbers
(d) Masses


Answer: (b) Electrons

2. The atomic number is not changed by which type of radioactive decay?
(a) Beta
(b) Gamma
(c) Alpha
(d) The atomic number is affected by all forms of radioactive decay


Answer: (b) Gamma

3. Isotopes of an element have a different number of
(a) Proton
(b) Neutron
(c) Electron
(d) atom


Answer: (b) Neutron

4. Three types of radioactive elements are emitted when unstable nuclei undergo radioactive decay. Which of the following is not one of them
(a) Beta
(b) Gamma
(c) Alpha
(d) delta


Answer: (d) delta

5. A nuclear fission reaction becoming self-sustaining depends on
(a) electrons
(b) Neutrons
(c) Energy
(d) Protons


Answer: (b) Neutrons

6. Helium nuclei particles are called
(a) Gamma particles
(b) Beta particles
(c) Alpha particles
(d) No particles that are helium nuclei


Answer: (c) alpha particles

7. When two atomic nuclei combine it is called as
(a) Chain reaction
(b) Nuclear fusion
(c) Nuclear decay
(d) Nuclear fission


Answer: (b) Nuclear fusion

8. The number of protons or atomic number is reduced to 2 by which form of radioactive decay?
(a) Beta-decay
(b) Gamma decay
(c) Alpha decay
(d) None of the above


Answer: (c) Alpha decay

9. Which statement is true for all three types of radioactive emission?
(a) They are deflected by electric fields
(b) They ionise gases
(c) They are completely absorbed by a thin aluminium sheet
(d) They emit light


Answer: (b) They ionise gases

10. A nuclide of the element plutonium 94 Pu 242. What is the number of neutrons in its nucleus?
(a) 242
(b) 336
(c) 148
(d) 94


Answer: (c) 148

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