Which of the following compounds on heating with zinc powder in alcohol finally gives ethyne?

Options

A. 1,2,2,2-Tetrabromoethane
B. 1,1,2,2-Tetrabromoethane
C. 1,1-dibromoethane
D. 1,2-Dibromoethane

Answer

B

Explanation

`{:(CHBr_(2),),(|,),(CHBr_(2),):}+2Znoverset(CH_(3)OH)to2ZnBr_(2)+CH-=CH`