Nuclei | MCQs Quiz-01 Nuclei Share with your friends here! Nuclei | Quiz-01 General Instructions There are total 10 questions in this quiz. Each question carries one mark. There is no negative marking. Keep a rough notebook with you for rough work. All the best! 1. Assertion- Nuclei having mass number about 60 are most stable.Reason- When two or more light nuclei are combined into a heavier nucleus, then the binding energy per nucleon will increase. Both Assertion and Reason are true and Reason is the correct explanation of assertion Both Assertion and Reason are true but Reason is NOT the correct explanation of assertion Assertion is true and Reason is false Both Assertion and Reason are false None 2. The radius of 13X27 nucleus is R. The radius of 53Y125 nucleus will be- (A) 5R/3 (B) (13/53)1/3 x R (C) (5R/3)1/3 (D) (13R/53)1/3 Option (A) Option (B) Option (C) Option (D) None 3. Which of the following is an essential requirement for initiating the fusion reaction? critical mass thermal neutrons high temperature critical temperature None 4. Which of the following statements is NOT true for nuclear forces? They are stronger than Coulomb forces. They have about the same magnitude for different pairs of nucleons. They are always attractive. They saturate as the separation between two nucleons increases. None 5. The difference in mass of 7X nucleus and total mass of its constituent nucleons is 21.00 u. The binding energy per nucleon for this nucleus is equal to the energy equivalent of- 3 u 3.5 u 7 u 21 u None 6. The curve of binding energy per nucleon as a function of atomic mass number has a sharp peak for helium nucleus. This implies that helium nucleus is- radioactive unstable easily fissionable more stable nucleus than its neighbours None 7. The binding energy per nucleon of deuteron and helium nucleus is 1.1 MeV and 7 MeV. If two deuteron nuclei fuse to form a helium nucleus, the energy released in the process is- 13.9 eV 19.2 eV 23.6 eV 26.9 eV None 8. One milligram of matter converted into energy will give- (A) 9 joule (B) 9 x 103 joule (C) 9 x 105 joule (D) 9 x 1010 joule Option (A) Option (B) Option (C) Option (D) None 9. Assertion- In a nuclear reaction, mass is not conserved but mass and energy are conserved as a single entity called mass-energy.Reason- Mass and energy are inter-convertible in accordance with Einstein's relation, E = mc2. Both Assertion and Reason are true and Reason is the correct explanation of assertion Both Assertion and Reason are true but Reason is NOT the correct explanation of assertion Assertion is true and Reason is false Assertion is false and Reason is also false None 10. The ratio of the nuclear densities of two nuclei having mass numbers 64 and 125 is- 64/125 4/5 5/4 1 None 1 out of 10 Time's up Share with your friends here!
