How can ethene be produced from ethanol - Vidyadip

MCQ

How can ethene be produced from ethanol

A
By dehydrohalogenation
B
By dehydrogenation
✓
By dehydration with conc. ${H_2}S{O_4}$ at ${170\,^o}C$
D
By reduction with hydrogen iodide

✓

Answer

Correct option: C.

By dehydration with conc. ${H_2}S{O_4}$ at ${170\,^o}C$

c
When ethanol is heated in presence of conc. $H _2 SO _4$, dehydration takes place to give ethylene.

The reaction of ethene with steam to form ethanol can be reversed. This allows ethanol to be converted into ethene. This is called a dehydration reaction.

$\underset{Ethanol}{C _2 H _5 OH} \xrightarrow[160^{\circ}-170^{\circ} C]{Conc. H _2 SO _4} \underset{Ethene}{CH _2= CH _2}+ \underset{Water}{H _2 O}$

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