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 |