✅ Correct Answer: 60% Nitrogen, 40%inert gases
Source: This question is taken from the Everyday Science
✅ Correct Answer: smallest particle of an element which can undergo a chemical reaction
✅ Correct Answer: Calcium oxalate
✅ Correct Answer: 78% Nitrogen
✅ Correct Answer: 0.03 to 0.04% CO2
✅ Correct Answer: 50 km to 85 km
✅ Correct Answer: Mineral
✅ Correct Answer: Ice and dust
✅ Correct Answer: 21% Oxygen approximately
✅ Correct Answer: A class of nucleic acids
✅ Correct Answer: Two Protons and two Neutrons
✅ Correct Answer: Oxygen
✅ Correct Answer: Hydrogen, Helium
✅ Correct Answer: All of above
✅ Correct Answer: Methane, Butane and Propane