Physics MCQ on Radioactivity for NEET, JEE, Medical and Engineering Exam 2021

MCQ on Radioactivity: Previous trends reveal that NEET/JEE aspirants find Physics as the most challenging section amongst the other sections. But most of them fail to decipher the reason behind this. This particularly can be as the candidates taking up this examination are predominantly medical aspirants with their subject of interest being Biology. Also, sections like Physics are more on theories, laws, numerical as opposed to Biology which is more of fact-based, life sciences and comprising of substantial explanations.

In this post we are providing you MCQ on Radioactivity, which will be beneficial for you in upcoming NEET, AIIMS, JEE, WBJEE, Medical and Engineering Exams.

MCQ on Radioactivity

Q1. Isotopes of an element have a different number of _______.
a) Proton
b) Neutron
c) Electron
d) atom

Q2. 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

Q3. A nuclear fission reaction becoming self-sustaining depends on _______.
a) electrons
b) Neutrons
c) Energy
d) Protons

Q4. A nuclide of the element plutonium 94 Pu 242. What is the number of neutrons in its nucleus?
a) 242
b) 336
c) 94
d) 148

Q5. When two atomic nuclei combine it is called as _______.
a) Chain reaction
b) Nuclear fusion
c) Nuclear decay
d) Nuclear fission

Q6. 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

Q7. 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

Q8. 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

Q9. 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

Q10. Helium nuclei particles are called _______.
a) Gamma particles
b) Beta particles
c) Alpha particles
d) No particles that are helium nuclei

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By Team Learning Mantras