What is the function of the collar of a Bunsen burner?

Answer 1

The collar regulates the amount of air which mixes with the fuel gas before it is burned. If the hole in the collar is not lined up with the hole in the bunsen stem, the fuel does most of its mixing with air at the top of the burner. This makes burning inefficient and the flame is cool. When the two holes line up, air is pre-mixed with the fuel, burning is much more efficient and the flame is as hot as possible.
the collar of a bunsen burner is the part which doesnt get hot and you can twist it to close or open the air hole.
Turning the collar opens and closes the air-hole which allows a controlled amount of oxygen to mix with the gas. The amount of air mixed in determines the colour and heat of the flame.
The collar controls the amount of air and thus oxygen that can reach the methane gas inside the burner. With the hole closed there is no additional oxygen to mix with the methane and so we have a yellow flame. Opening the hole allows oxygen to mix with the methane so it burns at a higher temperature and with a blue flame.
The collar on the Bunsen burner is to allocate as much oxygen as desired from the atmosphere into the Bunsen burner. The more oxygen in the Bunsen burner, the bluer or clearer the flame is. It is much hotter when in the blue flame.

Answer 2

The collar can be used to adjust how much air - and therefore oxygen - is mixed with the gas before it is ignited.

Answer 3

Can be turned to allow for more air to enter the burner

To adjust to control the air intake and the heat of the

Answer 4

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