Basic Science Questions and Answers updated daily – General Knowledge



158 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. Amalgams are



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Correct Ans:alloys which contain mercury as one of the contents
Explanation:


2. The main constituents of pearls are



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Correct Ans:calcium carbonate and magnesium carbonate
Explanation:


3. Which of the following is not an isotope of hydrogen?



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Correct Ans:Protium
Explanation:


4. Water is a good solvent of ionic salts because



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Correct Ans:it has a high dipole moment
Explanation:


5. Bell metal is an alloy of



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Correct Ans:tin and copper
Explanation:


6. Which metal pollute the air of a big city?



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Correct Ans:Lead
Explanation:


7. Which of the following does not contain a coinage metal?



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Correct Ans:Zinc and Gold
Explanation:


8. Balloons are filled with



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Correct Ans:helium
Explanation:


9. Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?



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Correct Ans:Refrigerator
Explanation:


10. Air is a/an



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Correct Ans:mixture
Explanation:


11. LPG consists of mainly



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Correct Ans:methane, butane and propane
Explanation:


12. Marsh gas is



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Correct Ans:methane
Explanation:


13. Permanent hardness of water can be removed by adding



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Correct Ans:washing soda
Explanation:


14. In fireworks, the green flame is produced because of



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Correct Ans:barium
Explanation:


15. Diamond is an allotropic form of



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Correct Ans:carbon
Explanation:


16. The filament of an electric bulb is made of



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Correct Ans:tungsten
Explanation:


17. The two elements that are frequently used for making transistors are



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Correct Ans:silicon and germanium
Explanation:


18. Actinides are the elements with atomic numbers from



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Correct Ans:89 to 103
Explanation:


19. What is laughing gas?



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Correct Ans:Nitrous Oxide
Explanation:


20. From which mineral is radium obtained?



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Correct Ans:Pitchblende
Explanation:



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