A hydrocarbon which decolorises KMnO4 solution & gives precipitate with ammonical AgNO3 is:
A
2-butene
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B
n-pentane
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C
2-butyne
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D
1-butyne
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Solution
The correct option is D 1-butyne KMnO4 oxidizes Alkenes and Alkynes into dicarboxylic acids. Terminal alkyne like 1−Butyne converts into Propionicacid and CO2 .
and 1−Butyne gives a white precipitate of silver butynide with ammonical AgNO3. This reaction is also particularly for terminal alkynes only.