What is the chemical name of laughing gas?
Correct answer D. Nitrous oxide
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Correct answer D. Nitrous oxide
Correct answer D. 5
Correct answer C. Hydrogen
Correct answer C. Speedometer
Correct answer B. Reptiles
Correct answer C. Carbon dioxide
Correct answer A. 12
Correct answer C. Traditional Chinese Medicine
Correct answer A. Pectoral and Pelvic
Correct answer D. Wood
Correct answer B. 4
Correct answer C. Seven colours
Correct answer B. Amphibians
Correct answer D. Increase over 10%
Correct answer B. 33 vertebrae
Correct answer A. Yellow dwarf
Correct answer C. Earthworm
Correct answer D. Deoxygenated blood
Correct answer A. Metacarpals
Correct answer C. Odontology