If your question is "Why is Acetylene and Oxygen used for welding/cutting NOT Oxygen and air"? This is why. Acetylene and air mixed in correct proportions produces a flame temperature of 4500F to 4800F degrees. Acetylene mixed with Oxygen in the correct proportions produces a flame well above 5500F degrees. This extra heat melts the metal faster and increases the speed you can cut or weld. Other gasses instead of Acetylene are used but do not produce as high a temperature. Oxygen is almost always used with these other gasses.
Ethene is used industrially more than chloroethane because ethene is a key building block in the production of many important chemicals such as polyethylene, which has a wide range of industrial applications. Chloroethane, on the other hand, is less versatile and has limited industrial uses compared to ethene. Additionally, ethene can be produced more cost-effectively and in larger quantities compared to chloroethane.
Bromine water test is used to show that ethene is unsaturated. In the presence of ethene, the red-brown color of bromine water disappears due to addition reaction with ethene, indicating its unsaturation.
The most common gas used in welding is a mixture of argon and carbon dioxide, known as shielding gas. This gas helps protect the weld pool from contaminants in the air and stabilizes the arc during the welding process.
The chemical formula for ethene (an alkene) is C2H4.
Acetylene is commonly used in welding with oxygen to create a high-temperature flame for cutting and welding metal.
Mainly In spot welding & resistance welding two type welding machines are used :- 1. Air Cooled & 2. water Cooled.
Any electrode holder that will accommodate the size of rod can be used. Twin Carbon Arc Welding requires a specific holder. Air Carbon Arc Gouging requires a special holder that also supplies a stream of air.
Ethene can react with Bromine water - turns colourless
It just dissipates into the air.
Yes, resistance welding is used in production welding. It is used extensively in the automotive industry.
Argon has a higher density than air and is used in welding applications to displace air (oxygen) from the weld.
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Welding Electrorodes or Welding Rods are used in arc welding. Arc welding is a special type of welding which uses a welding power supply to create an electric arc between the base material (e.g. steel) and the electrode. The Welding Ectrorodes can be used for all weldable aluminum and mild steel.
Exothermic Welding is used for earth mat conductors
ethene
There are a few commonly used welding process. The top used are shielded metal and arc welding.
When ethyne is burnt in air, it gives a sooty flame. This is due to incomplete combustion caused by limited supply of air. However, if ethyne is burnt with oxygen, it gives a clean flame with temperature 3000°C because of complete combustion. This oxy-acetylene flame is used for welding. It is not possible to attain such a high temperature without mixing oxygen. This is the reason why a mixture of ethyne and air is not used. Hope its fine with u !! all the best !!