Ethylene may be obtained by dehydration of which of the following with concentrated $H_{2} S O_{4}$ at $160 - 170^{\circ} C$ ?

C₂ H₅ OH

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CH₃ OH

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CH₃ CH₂ CH₂ OH

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(CH₃)₂ CHCH₂ OH

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Solution

The correct option is B C₂ H₅ OH
We know about dehydration of alcohols.

Ethyle alcohol on reaction with excess of conc. H2SO4 gives ethylene at 170°C

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H_{2} S O_{4}

160 - 170^{\circ} C

H_{2} S O_{4}

If all the following 4 compounds were sold at the same price , which would be cheapest for preparing an antifreeze solution for a car radiator?

(A) CH₃OH

(B) C₂H₅OH

(D) C₃H₅(OH)₃