A) Methane
B) Ethane
C) Acetylene
D) Ethene
Correct Answer: C
Solution :
\[2\,CH\equiv CH+5{{O}_{2}}\to 4\,C{{O}_{2}}+2{{H}_{2}}O\,\,\,\Delta H=-1300\,\,KJ\] 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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