Chemistry General Knowledge [GK] Questions and answers for preparing all PSC, SSC and other Competitive Examinations.
ELEMENTS
Answer: Hydrogen
2. Number of discovered elements?
Answer: 120
3. Names are given to ........ elements?
Answer: 112
4. 112th element in periodic table?
Answer: Coppernicium
5. 43rd element in periodic table?
Answer: Technetium
6. First artificial element?
Answer: Technetium
7. Lightest gas at S.T.P?
Answer: Hydrogen
8. Simplest element gas?
Answer: Hydrogen
9. Element Common to all acids?
Answer: Hydrogen
10. Most abundant element in the human body?
Answer: Oxygen
11. Most common element by weight in Earth’s crust?
Answer: Oxygen
12. Most ductile element?
Answer: Gold
13. Most conductive metal?
Answer: Silver
14. Most abundant metallic element in the human body?
Answer: Calcium
15. Most abundant element in the earth’s atmosphere?
Answer: Nitrogen
16. Most abundant metallic element in the earth’s crust?
Answer: Aluminium
17. The metal most used for house hold purpose?
Answer: Aluminium
18. The metal contained in clay?
Answer: Aluminium
19. The heaviest gaseous element?
Answer: Radon
20. Rarest element in the earth’s atmosphere?
21. Heaviest noble gas?
Answer: Radon
22. Element stored in Kerosene to prevent oxidation?
Answer: Sodium
23. The lightest metal element?
Answer: Lithium
24. Least dense metal?
Answer: Lithium
25. Least stable radioactive Isotope?
Answer: Lithium-5
26. The rarest naturally occurring element in the earth’s crust?
Answer: Astatine
27. Element with highest melting and boiling points?
Answer: Tungsten
28. Element used to make electric bulb filament?
Answer: Tungsten
29. Which is known as ‘wolfram’?
Answer: Tungsten
30. Highest thermal expansion?
Answer: Caesium
31. A bleaching agent?
Answer: Chlorine
32. The second most chemically active element?
Answer: Chlorine
33. The densest element?
Answer: Osmium
34. Most chemically active element?
Answer: Fluorine
35. Most electronegative element of the periodic table?
Answer: Fluorine
36. The radioactive gaseous element?
Answer: Radon
37. The second hardest natural substance?
Answer: Corundum
38. The crystalline form of Aluminium oxide?
Answer: Corundum
39. The Largest Atom?
Answer: Francium
40. Lowest atomic volume?
Answer: Boron
41. Most abundant carbon compound in the nature?
Answer: Cellulose
42. Most stable radioactive Isotope?
Answer: Tellurium-130
43. Most toxic radioactive Isotope in air?
Answer: Thorium-238
44. Most toxic non-radioactive element in air?
Answer: Beryllium
45. Hardest substance in the world?
Answer: Diamond
46. White phosphorus is kept in?
Answer: Under water
47. The phosphorus used in the manufacture of match boxes?
Answer: Red phosphorus
48. Ore of Uranium?
Answer: Pitchblende
49. Heavy hydrogen is:
Answer: Deuterium
50. Gas used to fill electric bulb used for advertisement?
Answer: Neon
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