Question

please explain the general methods of preparation of alkynes.​

Answer 1

Answer:

• 1)From calcium carbide:By treating calcium carbide with water
• CaC2+2H2O -} Ca(OH)2 +C2H2

2)From vicinal dihalide: vicinal halide on treatment with alcoholic potassium hydroxide undergo dehydrohalogenation . One molecule of hydrogen halide is eliminated to form allengil halide which on treatment with sodamide gives alkynes