A) iodine in \[CC{{l}_{4}}\]
B) bromine in \[CC{{l}_{4}}\]
C) alkaline \[KMn{{O}_{4}}\]
D) ammonical \[C{{u}_{2}}C{{l}_{2}}\]
Correct Answer: D
Solution :
\[{{I}_{2}}/CC{{l}_{4}},\,B{{r}_{2}}/CC{{l}_{4}}\] and alkaline \[KMn{{O}_{4}}\] are used to test for unsaturation, therefore, these tests are only performed by ethene. Ammonical\[C{{u}_{2}}C{{l}_{2}}\] is not used to distinguish ethene from ethane. It is used to distinguish ethene from ethyne.
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