A) \[{{C}_{2}}{{H}_{6}}>{{C}_{2}}{{H}_{4}}>{{C}_{2}}{{H}_{2}}\]
B) \[{{C}_{2}}{{H}_{2}}>{{C}_{2}}{{H}_{6}}>{{C}_{2}}{{H}_{4}}\]
C) \[{{C}_{2}}{{H}_{2}}>{{C}_{2}}{{H}_{4}}>{{C}_{2}}{{H}_{6}}\]
D) All are equally reactive
Correct Answer: C
Solution :
Unsaturated hydrocarbons are more reactive than saturated hydrocarbons. Among ethyne \[({{C}_{2}}{{H}_{2}})\] and ethene \[({{C}_{2}}{{H}_{4}})\] the later is more reactive as \[C\equiv C\] triple bond is quite strong bond and therefore ethyne generally require catalysts (like \[H{{g}^{2+}}\] etc) in its reactions.
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