Science General Knowledge Questions and Answers

Questions Answers
1. What is the colour of turmeric in basic solution? Red
2. What is the pH level of turmeric? 7.4 and 8.6
3. Which bases dissolve in water Alkali base
4. Which acid present in tomato? Citric acid
5. What is responsible for converting milk into curd? Lactobacillus bacteria
6. Healing of wounds is hastened by which vitamin? C
7. Which acid is in banana? Malic acid
8. What produce when base reacts with acid? Neutralization reaction
9. Lime water reacts with chlorine to give? Baking soda
10. What is the pH of acid rain? Below 5.0
11. What is pH balance of pure water? 7
12. What fatty acids are in fish? Omega-3 fatty acids
13. What is the most ductile metal? Platinum
14. What is the most malleable metal? Gold
15. Which metal is the best conductor of electricity? Copper and Silver
16. What produces if you heat copper? Black copper oxide

17. What reacts with water to produce fire? The alkali metals – Sodium, Potassium and Lithium
18. What is the Molecular Formula of Gold? Au
19. Where does the o2 released during photosynthesis come from? Water
20. Which metal is kept in kerosene oil to prevent fire? Sodium metal
21. Which metal is stored in water? White phosphorus
22. What gas makes up 80% of the atmosphere? Nitrogen
23. What gives yellow colour to old leaves? chlorophyll
24. How much of the earth’s atmosphere is constituted of argon? 0.93 percent
25. What is the green coating on copper called? Copper oxide
26. What is the black coating when silver is exposed to air? Silver sulphide
27. When mercury alloyed with other metal is called? Amalgam
28. Which plant hormone is responsible for fall of senescent leaves? Abscisic acid
29. What proteins are made of? Amino acids
30. What are the final products of photosynthesis? Glucose and oxygen

31. Which is an alloy of copper and zinc? Brass
32. The chemical bonds form between non metals is called? Covalent Bonds
33. What is the formula of Ethane? C2H6
34. What percentage of the human body is water? 60%
35. Which blood cells are important for immunity? White Blood Cells
36. Which cells are responsible for carrying messages? Nerve cells
37. Where is the smallest bone in the human body found? Middle ear.
38. What is the largest organ of the human body? The skin
39. What is the name of the biggest part of the human brain? cerebrum
40. What is the longest bone in the human body? femur (thighbone)
41. What is the smallest bone in the human body? stapes (Found in Middle ear)
42. What are hair skin and nails made of? keratin
43. What are the two holes in your nose called? Nostrils
44. How many lungs are in the human body? Two lungs

45. What is the shape of DNA called? double helix
46. What sugar is found in DNA? Deoxyribose sugar
47. What sugar is found in RNA? Ribose sugar
48. What is the biggest and most powerful in the human body? Gluteus maximus
48. how many chambers does the heart have? Four chambers
49. What bones protect the heart? Rib cage
50. What organ is the longest in the human body? Small intestine
51. What is another word for “voice box”? larynx
52. How many parts do the brain have? Three parts- the cerebrum, cerebellum and brainstem.
53. The innermost part of bones contains what? Bone marrow
54. What tissue connects bone to bone? Ligament
55. What is the amount of blood contains in the human body? 5-6 litres
56. What is the percentage of calcium stored in the bones? 97%
57. How many teeth are there in the human body in adult life? 32 teeth
58. What tissue connects to muscle to bone? Tendon
59. Who invented human blood grouping system? Karl Landsteiner
60. Who is the father of insulin? Frederick Banting