Basic Science Questions and Answers updated daily – General Knowledge


Basic Science Questions and Answers updated daily – General Knowledge



196 Basic Science Questions and answers section with explanation for various online exam preparation, various interviews, General Knowledge Basic Science online test. Basic Science Questions with detailed description, explanation will help you to master the topic.

Basic Science Questions

1. According to Avogadro's Hypothesis, the smallest particle of an element or a compound, that can exist independently, is called ____ .



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Correct Ans:a molecule
Explanation:


2. 'No two electrons in an atom can have the same set of four quantum numbers' is



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Correct Ans:Pauli's exclusion principle
Explanation:


3. In an atomic nucleus, neutrons and protons are held together by



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Correct Ans:exchange forces
Explanation:


4. The dark lines in the solar spectrum are due to



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Correct Ans:absorption of corresponding wavelengths by the outer layers of the sun
Explanation:


5. Who suggested that most of the mass of the atom is located in the nucleus?



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Correct Ans:Rutherford
Explanation:


6. The age of most ancient geological formations is estimated by



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Correct Ans:Uranium - lead method
Explanation:


7. he isotope of uranium capable of sustaining chain reaction is



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Correct Ans:U-235
Explanation:


8. Which of the following has a least penetrating power?



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Correct Ans:Alpha particles
Explanation:


9. What is the wavelength of visible spectrum?



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Correct Ans:3900 - 7600 angstrom
Explanation:


10. Which of the following shows the masses of the three elementary particles in decreasing order?



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Correct Ans:Baryons, Mesons, Leptons
Explanation:


11. Which radioactive pollutant has recently drawn to public, due to its occurrence in the building material?



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Correct Ans:Thorium
Explanation:


12. Mesons are found in



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Correct Ans:Cosmic rays
Explanation:


13. The wavelength of X-rays is of the order of



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Correct Ans:1 angstrom
Explanation:


14. Isotopes are separated by



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Correct Ans:distillation
Explanation:


15. In an atomic explosion, enormous energy is released which is due to



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Correct Ans:conversion of mass into energy
Explanation:


16. Atoms are composed of



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Correct Ans:electrons and nuclei
Explanation:


17. Which among the following is a positively charged particle emitted by a radioactive element?



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Correct Ans:Alpha ray
Explanation:


18. Which of the following is used as a moderator in nuclear reactor?



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Correct Ans:Graphite
Explanation:


19. Knot is a unit of speed of which of the following?



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Correct Ans:Ship
Explanation:


20. Nautical mile is a unit of distance used in



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Correct Ans:navigation
Explanation:



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