31. Highly intelligent Mammals are_________?
A. rat
B. dolphin
C. bat
D. Elephant

32. When sugar is added to water, its boiling point:__________?
A. Increase
B. Decrease
C. Remain unchanged
D. None of the above

33. Permanent hardness of water may be removed by the addition of___________?
A. Sodium Carbonate
B. Alum
C. Potassium Permanganate
D. Lime

34. Human eye is how many Megapixels?
A. 1080 MP
B. 720 MP
C. 576 MP
D. 570 MP

35. Vitamin C is essential for___________?
A. Appetite
B. Growth & repairing of tissues
C. Muscles
D. Brain

36. Who discovered that the earth was not the center of the universe?
A. Aristotle
B. Nicolaus Copernicus
C. Sir Isac Newton
D. None

37. For the generation of biogas, the materials commonly used are__________?
A. Animal wastes
B. Forest residues
C. Aquatic plants
D. None of these

38. Which of these is NOT an example of a renewable energy source?
A. Wind energy
B. solar
C. Coal
D. Hydroelectric power

39. Which of these is NOT a form of energy?
A. Heat
B. Light
C. Temperature
D. Electricity

40. ___________ is a mammal who fly?
A. Ostrich
B. Bat
C. Peacock
D. None of these

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