1.

Which of the following gases is used for welding

Answer»

Methane
Ethane
Acetylene
Ethene

Solution :`2CH-=CH + 5O_(2) rarr 4CO_(2) + 2H_(2)O Delta H = -1300 KJ`
The combustion of acetylene is HIGHLY exothermic and the HEAT PRODUCED during the combustion can be used for welding PURPOSES in the form of oxy acetylene flame.


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