31. What substance can be used to meltice on icy roads?
A) Chlorine
B) Salt
C) Carbon dioxide
D) Water
32. What percentage of water is found in milk?
A) 83%
B) 86%
C) 78%
D) 87%
33. Which of the following materials is the most elastic?
A. Plastic
B. Glass
C. Rubber
D. Steel
34. What is the primary component of the atmosphere on Mars?
A. Hydrogen
B. Chlorine
C. Nitrogen
D. Carbon dioxide
35. How many amino acids are present in an insulin molecule?
A. 41
B. 21
C. 51
D. 22
36. What is air primarily composed of?
A. Solid
B. Liquid
C. Gas
D. None
37. Eggs are a rich source of nutrients except for which one?
A. Fats
B. Vitamin A
C. Protein
D. Vitamin C
38. Which planet is the outermost in the solar system?
A. Mercury
B. Pluto
C. Neptune
D. Uranus
39. What is the result of a deficiency of vitamin A?
A. Scurvy
B. Hair fall
C. Rickets
D. Night blindness
40. How many liters of air does the human body breathe in each day?
A. 15,000 to 20,000
B. 5,000 to 10,000
C. 10,000 to 15,000
D. 20,000 to 25,000
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