Ethanol (ch3-ch2oh) and dimethyl ether (ch3-o-ch3) are functional group isomers....ethanol has alcohol functional group while dimethyl ether has ether functional group....

Isomers of Ethanol

Ethanol, also known as ethyl alcohol, is a common organic compound with the chemical formula C2H5OH. It is a clear, colorless liquid that is commonly used as a solvent, fuel, and recreational drug. Ethanol has several isomers, which are compounds with the same molecular formula but different structural arrangements.

Explanation:

Among the options provided, the correct answer is option 'D', which is Dimethylether. Let's understand why Dimethylether is the isomer of ethanol.

Ethanol
Ethanol has the molecular formula C2H5OH. It consists of two carbon atoms (C2), six hydrogen atoms (H6), and one oxygen atom (O1). The carbon atoms are bonded together by a single bond, and each carbon atom is also bonded to three hydrogen atoms. One of the carbon atoms is further bonded to the oxygen atom, forming the hydroxyl group (-OH).

Dimethylether
Dimethylether has the molecular formula CH3OCH3. It consists of two carbon atoms (C2), six hydrogen atoms (H6), and one oxygen atom (O1). The carbon atoms are bonded together by a single bond, and each carbon atom is also bonded to three hydrogen atoms. However, instead of a hydroxyl group, dimethylether has an oxygen atom bonded to each carbon atom. This arrangement gives it different chemical properties compared to ethanol.

Other Options:
a) Methanol: Methanol (CH3OH) is not an isomer of ethanol. It has only one carbon atom and lacks the second carbon atom present in ethanol.
b) Acetone: Acetone (CH3COCH3) is not an isomer of ethanol. It has a different functional group (a ketone) and an additional carbon atom compared to ethanol.
c) Diethylether: Diethylether (C4H10O) is not an isomer of ethanol. It has four carbon atoms and lacks the hydroxyl group present in ethanol.

In conclusion, among the given options, the correct isomer of ethanol is Dimethylether (CH3OCH3). It has the same molecular formula as ethanol but a different structural arrangement.