Binding Energy Fission & Fusion — Practice Questions
Free NEET Physics multiple-choice questions on Binding Energy Fission & Fusion. Attempt each question and reveal the answer with a full explanation.
During nuclear fusion, if the mass of the reactants is M r and the mass of the products is M p , which of the following is true? M r > M p M r < M p M r = M p M r M p In a nuclear fusion reaction, two deuterons ( 1 2 H ) fuse to form a helium nucleus ( 2 4 He ). If the mass of a deuteron is 2.0141 u and the mass of a helium nucleus is 4.0026 u , the energy released is approximately: 23.8 MeV 13.6 MeV 0.025 MeV 931 MeV During a nuclear fusion process, which of the following is true? Total binding energy of the product is greater than that of the reactants Mass of the product is equal to the sum of the masses of the reactants The process only occurs at very low temperatures The product nucleus is always unstable The binding energy per nucleon for a nucleus with A=100 is 8.5 MeV . If it splits into two nuclei with A=50 and binding energy per nucleon 7.5 MeV each, the energy released in the process is: -100 MeV 100 MeV 200 MeV 0 MeV A heavy nucleus X with mass number A=240 has binding energy per nucleon 7.6 MeV . It fissions into two identical fragments Y ( A=120 ) with binding energy per nucleon 8.5 MeV . The energy released in this process is: 216 MeV 0.9 MeV 108 MeV 240 MeV The binding energy per nucleon for a deuteron ( 1 2 H ) and an alpha particle ( 2 4 He ) are x 1 and x 2 respectively. In the reaction 1 2 H + 1 2 H 2 4 He + Q , the energy Q released is: 4(x 2 - x 1) 2(x 2 - x 1) 4(x 1 + x 2) 2(x 1 + x 2) The binding energy per nucleon of 3 7 Li and 2 4 He nuclei are 5.60 MeV and 7.06 MeV , respectively. In the nuclear reaction 3 7 Li + 1 1 H 2 2 4 He + Q , the value of energy Q released is: 17.28 MeV 19.6 MeV -2.4 MeV 8.4 MeV A nucleus with mass number 220 splits into two fragments of mass numbers 105 and 115. If binding energy per nucleon of the parent is 5.6 MeV and for fragments is 6.4 MeV , the energy released is: 176 MeV 88 MeV 0.8 MeV 220 MeV In the nuclear fusion reaction 1 2 H + 1 2 H 2 3 He + 0 1 n , the masses are: 1 2 H = 2.0141 u , 2 3 He = 3.0160 u , and 0 1 n = 1.0087 u . The energy released in this reaction is approximately: 3.26 MeV 2.45 MeV 1.23 MeV 4.50 MeV Fusion reaction takes place at high temperature because: Kinetic energy is high enough to overcome coulomb repulsion Nuclei are unstable at high temperature Molecules break up at high temperature Atoms are ionized at high temperature In the context of the binding energy per nucleon curve, which of the following processes results in the release of energy? Both Fission of heavy nuclei and Fusion of light nuclei Only Fission of heavy nuclei Only Fusion of light nuclei Neither Fission nor Fusion During the fusion of two light nuclei into a heavier one, the mass defect is 0.02 u . The energy released in this process is approximately: 18.6 MeV 931.5 MeV 0.02 MeV 1.86 MeV The energy released in the fission of a single 235 U nucleus is approximately: 200 MeV 20 MeV 2000 MeV 2 MeV In the nuclear fusion of four protons to form a helium nucleus, the energy released is primarily due to: Mass defect being converted into energy Coulomb repulsion between protons The absorption of neutrinos Gravitational collapse of the core The energy released in nuclear fusion in stars like the Sun is primarily due to: Conversion of mass into energy Gravitational collapse Chemical combustion of hydrogen Fission of heavy elements In the reaction 1 2 H + 1 3 H 2 4 He + 0 1 n , if the binding energies of 1 2 H , 1 3 H and 2 4 He are a, b and c (in MeV) respectively, then the energy (in MeV) released is: c - (a + b) a + b - c c - a - b + n a + b + c A nucleus of mass number A=240 and binding energy per nucleon 7.6 MeV breaks into two fragments each of A=120 with binding energy per nucleon 8.5 MeV . The total gain in binding energy is: 216 MeV 0.9 MeV 9.4 MeV 80 MeV