Question

how ethane is prepared from ethanol . give reaction

Answer 1

Ethanol can be converted to ethene in presence of concentrated sulphuric acid. It is called as dehydration reaction. b) Ethene can be converted to ethane by addition of hydrogen molecule. It is known as hydrogenation reaction.

Answer 2

Ethanol can be converted to ethene in presence of concentrated sulphuric acid. It is called as dehydration reaction. 
CH​3-CH2-OH −→−−−−−−−−−−Concentrated H2SO4 CH2=CH2 + H2O