Hydrocarbons Question 362
Question: A gas decolourised $ KMnO_4 $ solution but gives no precipitate with ammoniacal cuprous chloride is or Which of the following gases does not give a precipitate with ammoniacal solution of silver nitrate but decolourizes $ KMnO_4 $ (neutral or slightly alkaline) [NCERT 1974, 77; CPMT 1974, 77, 78; MP PMT 1996; MP PET 1996, 99]
Options:
A) Ethane
B) Methane
C) Ethene
D) Acetylene
Show Answer
Answer:
Correct Answer: C
Solution:
Ethane and Methane does not decolourise $ KMnO_4 $ and does not react with ammonical cuprous chloride.
Acetylene decolourise $ KMnO_4 $ solution and also gives red ppt.
with ammonical cuprous chloride.
On the other hand ethene decolourize $ KMnO_4 $ solution but does not react with ammonical cuprous chloride.
BETA
