Q31. Which planet is closest to the Sun?
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Q32. Which element has the chemical symbol "O"?
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Q33. Which is the largest ocean on Earth?
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Q34. What is the speed of sound?
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Q35. Which country is the largest producer of rice?
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Q36. Which is the national bird of India?
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Q38. What is measured in decibels?
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Q39. Calculate the area of a triangle with base 10 cm and height 5 cm.
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Q40. Which is the smallest bone in the human body?
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