General knowledge

General knowledge questions/answers related to common and general sciences for competitive examinations.

  1. What is, the chemical symbol, for water,?
    Answer: “H2O”..

2.What is ,the largest organ, in the human body,?
Answer: “Skin”..

  1. What is, the process, by which plants make, their own food, called?
    Answer: “Photosynthesis”..
  2. What is, the chemical symbol, for gold?
    Answer: “Au”..
  3. What is ,the closest planet, to the Sun?
    Answer: “Mercury”..
  4. What is ,the chemical formula, for table salt,?
    Answer: “NaCl”..
  5. Who is regarded, as the father of, modern physics?
    Answer: “Albert Einstein”..
  6. What is, the study of earthquakes, called?
    Answer: “Seismology”..
  7. What is, the hardest natural substance, on Earth?
    Answer: “Diamond”..
  8. What is, the powerhouse, of the cell?
    Answer: “Mitochondria”..
  9. What is ,the chemical symbol, for oxygen?
    Answer: “O2”..
  10. What is, the main gas, that makes up the Earth’s atmosphere,?
    Answer: “Nitrogen”..
  11. What causes tides, in the ocean?
    Answer: “Gravitational pull from the Moon and the Sun”..
  12. What is, the study of living organisms, called?
    Answer: “Biology”.
  13. What is, the process by which water changes, from a liquid, to a gas called?
    Answer: “Evaporation”..
  14. What is, the chemical symbol, for carbon dioxide?
    Answer: “CO2”..
  15. What is ,the layer of the Earth’s atmosphere, where weather occurs?
    Answer: “Troposphere”..
  16. What is, the only planet, in the solar system, known to support life?
    Answer: “Earth”..
  17. What is, the study of the Earth’s physical structure, and substance called?
    Answer: “Geology”..
  18. What is, the process by which plants release water vapour, into the atmosphere called?
    Answer: “Transpiration”..
  19. What is, the chemical symbol, for (iron),?
    Answer: “Fe”..
  20. What is ,the largest organ, inside the (human body),?
    Answer: “Liver”..
  21. What is, the chemical formula, for (glucose),?
    Answer: “C6H12O6”..
  22. What is ,the study of the stars ,and celestial objects called,?
    Answer: “Astronomy”..
  23. What is, the chemical symbol ,for (helium)?
    Answer: “He”..
  24. What is the force that pulls objects towards t(centre of the Earth), 🌎?
    Answer: “Gravity”..
  25. What is, the chemical formula, for (ammonia),?
    Answer: “NH3”..
  26. What is, the main component ,of (the Earth’s core),?
    Answer: “Iron”..
  27. What is, the only planet, in (the solar system), that rotates on its side,?
    Answer: “Uranus”..
  28. What is, the study of the behaviour, and properties of matter known as,?
    Answer: “Chemistry”..
  29. What is, the chemical symbol, for (sodium),?
    Answer: “Na”..
  30. What is, the main function, of red blood cells, in the (human body),?
    Ans:“To carry oxygen”..
  31. What is, the chemical formula, for (carbon monoxide),?
    Answer: “CO”..
  32. What is, the process, by which plants, take in carbon dioxide ,and release oxygen known as,?
    Ans: “Photosynthesis”..
  33. What is ,the unit, of measurement ,for (electric current),?
    Answer: “Ampere (A)”..
  34. What is the chemical symbol, for (potassium),?
    Answer: “K”..
  35. What is, the study of, (the Earth’s atmosphere), known as,?
    Ans: “Meteorology”..
  36. What is ,the chemical formula, for (methane),?
    Answer: “CH4”..
  37. What is ,the centre of an atom known as, which contains (protons, and neutrons),?
    Answer: “Nucleus”..
  38. What is, the chemical symbol, for (silver),?
    Answer: “Ag”..
  39. What is ,the (study of heredity), and variation, in organisms known as,?
    Answer: “Genetics”..
  40. What is, the chemical formula, for (water)?
    Answer: “H2O”..
  41. What is, the process, by which plants lose water, through their leaves called,?
    Answer: “Transpiration”..
  42. What is, the study of the structure ,and properties of matter known as,?
    Answer: “Chemistry”..
  43. What is, the chemical symbol ,for (carbon),?
    Answer: “C”..
  44. What is ,the process, by which rocks ,are broken down, into smaller pieces called,?
    Answer: “Weathering”..
  45. What is, the unit, of measurement ,for (energy),?
    Answer: “Joule (J)”..
  46. What is, the chemical symbol ,for (nitrogen),?
    Answer: “N2”..
  47. What is, the ( study of ,the Earth’s physical features), called,?
    Answer: “Geography”..
  48. What is ,the chemical formula, for (hydrogen peroxide)?
    Answer: “H2O2”..

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