Question

how to convert ethane to ethene please help

Answer 1

Step 1. Bromination of ethane

underbrace("CH"_3"CH"_3)_color(red)("ethane") + "Br"_2 stackrelcolor(blue)(hνcolor(white)(mm))(→) underbrace("CH"_3"CH"_2"Br")_color(red)("bromoethane")

Step 2. Dehydrobromination of bromoethane

underbrace("H-CH"_2"-CH"_2"-Br")_color(red)("bromoethane") stackrelcolor(blue)("alc. KOH", Δcolor(white)(mm))(→) underbrace("CH"_2"=CH"_2)_color(red)("ethene")

This is the answer