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Distinguish between but-1-yne and. But-2-yne using a reaction??

Distinguish between but-1-yne and. But-2-yne using a reaction??

Grade:11

6 Answers

Arun
25750 Points
6 years ago
1 butene has a double bond between the 1st and 2nd carbon atom 
1 butyne has a triple bond between the 1st and 2nd carbon atom
 
But-1-yne + KMnO4 /H+ = Butane -2-3 di one
but-2-yne + KMnO4 /H+ = Butanal -1- one
qwert
12 Points
6 years ago
Can we use NaNH2?
How do we know why to use KMnO4?
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BUBAI MAJHI
35 Points
6 years ago
But-1-yne is terminal alkyne and but-2-yne is nonterminal alkyne.So but-1-yne reacts with Na to form H2 but but-2-yne does not react with Na.Not only that but-1-yne reacts with ammonical silver nitrate and cuprous chloride solution to form white and red colour precipitate respectively. But but-2-yne being a nonterminal alkyne does not involve in these reaction.
aditya verma
47 Points
5 years ago
tollens test will be given by terminal alkynes... this way they can be differentiated... if ppt is found the alkyne is But-1-yne if not then it is But-2-yne 
 
Yash jain
15 Points
5 years ago
Ammoniacal Cucl2 solution reacts with but1yne to form white Nd red colour precipitate and can be distinguished by but 2 yne
 
Avati Jackitan
15 Points
4 years ago
But-2-ene and But-2-yne can be best differentiated using ammoniacal silver nitrate solution
Observation:but-2-ene ,No observable change
                       But-2-yne,white ppt formed

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