write down the laboratory preparation methord of alkyne with diagram and chemical equation
Answers
Answer:
At the industrial level, the synthesis of alkynes is done using calcium carbide. Calcium Carbide is prepared by heating quicklime(CaO) in the presence of coke (C). When calcium carbide is made to react with water, It results in the formation of calcium hydroxide and acetylene.
Explanation:
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Answer:
Alkynes are unsaturated hydrocarbons containing a triple bond between two carbon atoms. The least number of hydrogen atoms is present in alkynes among alkanes, alkenes, and alkynes. The general formula of this class of organic compound is CnH2n-2
The first stable of an alkyne is ethyne or acetylene.
Preparation of Alkynes
Alkynes from Calcium Carbide
This is the industrial method for the preparation of ethyne. In this method, calcium carbide undergoes treatment with water to form ethyne. Preparation of calcium carbide is possible by heating quicklime and coke. We can obtain quicklime by heating limestone.
Alkynes from Vicinal Dihalides
Treatment of vicinal dihalides with potassium hydroxide (alcoholic) results in the dehydrohalogenation reaction. In this reaction, removal of a hydrogen halide molecule takes place thereby forming alkenyl halide. Furthermore, treatment of Alkenyl halide with sodamide produces alkyne.
