A) Ethane
B) Methane
C) Ethene
D) Acetylene
Correct Answer: C
Solution :
Ethane and Methane does not decolourise \[KMn{{O}_{4}}\] and does not react with ammonical cuprous chloride. Acetylene decolourise \[KMn{{O}_{4}}\] solution and also gives red ppt. with ammonical cuprous chloride. On the other hand ethene decolourize \[KMn{{O}_{4}}\] solution but does not react with ammonical cuprous chloride.
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