Which of the following reaction will give alkyne ?

Options

A. `CH_3underset(Cl)underset(|)CH-underset(Cl)underset(|)CH-CH_3 underset(H_3O^(+))overset(NaNH_2)to `
B. `CH_3CH_2 CHBr_2 underset((ii) NaNH_2)overset((i) alc. KOH)to`
C. `R-C -= CNa overset(R^(1)-X)to`
D. Potassium maleate `overset("electrolysis")to`

Answer

A, B, C, D

Explanation

Preparation of Alkynes
`{:(CHCOOK),(||),(CHCOOK):} overset("Electrolysis")to {:(CH),(|||),(CH):} + 2CO_2 + 2KOH + H_2`
`R-C -= CNa overset(R^(1)-X)to R -C -= C - R^(1) + NaX`
`R-CHBr - CH_2Br - + 2NaNH_2 to R - C -= CH + 2NaBr`