Question

write the chemical equation representing preparation of Ethene from ethanol

Answer 1

Heating ethanol at 443 K with excess concentrated sulphuric acid results in dehydration of ethanol to give ethene:-

CH3-CH2OH ------->CH2=CH2 +H2O

 (ethanol)    (H2SO4)     (ethene)

The concentrated sulphuric acid can be regarded as a dehydration agent which remove water from ethanol