A) Propyne < Ethyne < Ethane < Ethene
B) Ethyne < Ethene< Ethane < Propyne
C) Propyne > Ethane > Ethyne > Ethene
D) Propyne > Ethane > Ethene > Ethyne
Correct Answer: B
Solution :
\[\underset{Ethane}{\mathop{2{{C}_{2}}{{H}_{6}}}}\,+7{{O}_{2}}\xrightarrow{{}}4C{{O}_{2}}+6{{H}_{2}}O\] \[\underset{Ethene}{\mathop{{{C}_{2}}{{H}_{4}}}}\,+3{{O}_{2}}\xrightarrow{{}}2C{{O}_{2}}+2{{H}_{2}}O\] \[\underset{Ethyne}{\mathop{2{{C}_{2}}{{H}_{2}}}}\,+5{{O}_{2}}\xrightarrow{{}}4C{{O}_{2}}+2{{H}_{2}}O\] \[\underset{\Pr opyne}{\mathop{{{C}_{3}}{{H}_{4}}+4{{O}_{2}}}}\,\xrightarrow{{}}3C{{O}_{2}}+2{{H}_{2}}O\]
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