Punjab 10th Class Physics Chapter 9 Atomic and Nuclear Physics Mcqs Test Online Punjab 10th Class Physics Chapter 9 Atomic and Nuclear Physics Mcqs Test Online 1234567891011121314151617181920Show paginator Hide paginator 100% Page 1 of 1Physics 1. When a heavy nucleus splits into two lighter nuclei, the process would: 1.Release chemical energy 2.Release nuclear energy 3.Absorb nuclear energy 4.Absorb chemical energy 2. Release of energy by the Sun is due to: 1.Nuclear fission 2.Chemical reaction 3.Burning of gases 4.Nuclear fusion 3. Isotopes are atoms of same element with different: 1.Number of electrons 2.Atomic mass 3.Atomic number 4.Number of protons 4. The mass of neutron is nearly equal to the mass of: 1.Proton 2.Neutron 3.Nucleus 4.Electron 5. The half-life of certain isotope is 1 day. What is the quantity of the isotope after 2 days? 1.One eight 2.One quarter 3.One half 4.None of these 6. The elements showing radioactivity have atomic number greater than: 1.82 2.99 3.58.5 4.235 7. Radioactivity is a _________ process. 1.None of these2.Reversible 3.Irreversible 4.Cyclic 8. Which one is a radioactive element? 1.All of these 2.Plutonium 3.Radium 4.Uranium 9. If atomic number is 92 and mass number is 235 of an atom, then number of electrons will be: 1.235 2.None of these3.92 4.143 10. The range for a-rays emitted by Uranium is: 1.8.62 cm 2.7.2cm 3.86.2 cm4.2.7 cm 11. What happens to the atomic number of an element which emits one alpha particle and a beta particle? 1.Decreases by 2 2.Stays the same 3.Decreases by 14.Increases by 1 12. In metals, the current is produced due to the flow of: 1.Protons 2.Neutral charge 3.Free electrons 4.Positive charge 13. Which among the following radiations has more penetrating power? 1.A beta particle 2.An alpha particle 3.All have the same penetrating ability 4.A gamma ray 14. When Uranium (92 protons) ejects a beta particle, how many protons are left in the remaining nucleus? 1.91 protons 2.93 protons 3.90 protons 4.92 protons 15. The central part of an atom is called: 1.Nucleus 2.Proton 3.Neutron 4.Electron 16. Who discovered the process of radioactivity? 1.Einstein 2.Henry Becqueral 3.Newton 4.None of these 17. The isotopes, which emit radiations, are called: 1.None2.Emitted radiation 3.Radioisotopes 4.Nuclear isotopes 18. β-rays carry β charge. 1. None of these2.Negative 3.Positive 4.Both + ive & – ive 19. The reason carbon-dating works is that: 1.There is so much non-radioactive carbon dioxide in the air 2.When a plant or an animal dies 3.After a plant or animals dies, it stops taking fresh carbon-144.Plants and animals are such strong emitters of carbon -14 20. One of the isotopes of uranium is ²³⁸₉₂U. The number of neutrons in this isotope is: 1.238 2.92 3.3304.146 Loading... Test By Subject Punjab Test By Topics 10th Class Physics You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.