Choose the correct answer:
1. Kavin observed that certain items, such as paper, combusted with a complete flame, but others, like wood, ignited with a flame and thereafter emitted a red light, generating smoke. Could you help him in comprehending the science behind this?
i. Flames emerge when a gaseous substance burns.
ii. Flames are generated depending on the state of the matter.
iii. Occurence of flame is not dependent on the fuel.
i. Flames emerge when a gaseous substance burns.
ii. Flames are generated depending on the state of the matter.
iii. Occurence of flame is not dependent on the fuel.
2. What kind of flame do hydrocarbons with the formula \(C_nH_{(2n-2)}\) typically produce when it reacts with atmospheric air?