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5 votes
1 answer
1k views

Why would tellurium + sodium hydroxide have worked as a good anti-knock gasoline additive (if it wasn't so smelly)?

The April 22, 2022 Veritasium video The Man Who Accidentally Killed The Most People In History mentions several aspects of the historical use of tetra-ethyl lead in gasoline, the resulting widespread ...
uhoh's user avatar
  • 5,997
63 votes
1 answer
9k views

Why does shaking a match put the fire out?

Move a match slowly and nothing happens but if you shake it violently the fire will extinguish. Oxygen makes fire grow so why does waving a flame through the oxygen rich air put the fire out? Does ...
carb0nshel1's user avatar
14 votes
1 answer
2k views

Why do some materials turn black and others white after combustion?

Most solids objects turn black after they are burnt. But some turn white. Why is that ?
mick's user avatar
  • 305
10 votes
1 answer
1k views

Sugar burning with the assistance of ash

If a plain pile of sugar (or a sugar cube) is heated with a torch, it just melts and gives off smoke. However, if some paper or wood ashes are added, it burns quite easily. What are the ingredients of ...
sadljkfhalskdjfh's user avatar
7 votes
2 answers
13k views

Is there a flame which doesn't produce smoke?

I read a book where it states the following: There are many types of flame and there are even flames which don't produce smoke. After reading it, it just got stuck in my mind. Is there a flame ...
kartlad's user avatar
  • 207
1 vote
2 answers
131 views

Can we chemically characterize a flame? [closed]

Can we chemically characterize a flame ? Recently, while I was lighting a candle, I came across this question; can we find out the chemical composition of a particular flame? If yes then how? In ...
Nitro phenol's user avatar
0 votes
3 answers
28k views

C + O2 is equal to C + O, how is that possible

C + O = CO2 . This is because carbon has valency of 4 while oxygen has valency of 2. When they react the valencies are criss crossed which means we will get C2O4 but this is simplified to CO2. But ...
Abhishek Mhatre's user avatar