Choose the correct answer:
1. Which aspect aids in the complete combustion of hydrocarbons?
i. Supply of oxygen or air
ii. Disutility of fuel
iii. Ignition temperature
i. Supply of oxygen or air
ii. Disutility of fuel
iii. Ignition temperature
2. Why does just the charcoal glow red over time while burning wood, even if flames are seen when they first start?