Question

By treating methyl alcohol with conc. H₂SO₄ at 140°C. Which of the following products if formed?
(A) Ethene
(B) Dimethyl ether
(C) Methyl ethyl ether
(D) Ethyne

Answer 1

Hint : A dehydration reaction, also known as Zimmer's Hydrogenesis in chemistry, is a conversion in which the reacting molecule or ion loses water. Dehydration reactions, the inverse of hydration reactions, are common.

Complete Step By Step Answer:
A condensation reaction is a dehydration reaction. A water molecule is separated from one of the reactants during the process of combining two compounds, resulting in an unsaturated compound. Another obvious fact that a reaction is a dehydration reaction is the presence of water as one of the items.
Dehydration of two molecules of methanol in the presence of H₂SO₄ at 140°C produces Dimethyl ether as:
$2C{H_3}OH\xrightarrow[{{{140}^o}C}]{{conc.{H_2}S{O_4}}}C{H_3} - O - C{H_3} + {H_2}O$
Since it has a strong affinity for water and absorbs water rapidly, concentrated sulphuric acid is used as a drying and dehydrating agent.
Methanol (also known as wood alcohol and methyl alcohol) is a non-drinking form of alcohol that is primarily used to make gasoline, solvents, and antifreeze. It is a colourless liquid that is volatile, flammable, and toxic to humans, unlike ethanol.
The organic compound dimethyl ether has the formula CH₃OCH₃, which can be abbreviated to C₂H₆O. It is a colourless gas that can be used as a precursor to other organic compounds and as an aerosol propellant. It is currently being tested for use in a number of fuel applications. It's an ethanol isomer.

Note :
The organic compound dimethyl ether has the formula CH₃OCH₃, which can be abbreviated to C₂H₆O. It is a colourless gas that can be used as a precursor to other organic compounds and as an aerosol propellant. It is currently being tested for use in a number of fuel applications. It's an ethanol isomer.