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Which of the following is an isomer of diethyl ether?
A. ${{(C{{H}_{3}})}_{3}}COH$
B. $C{{H}_{3}}OH$
C. ${{C}_{3}}{{H}_{7}}OH$
D. ${{({{C}_{2}}{{H}_{5}})}_{2}}CHOH$

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Last updated date: 17th Jun 2024
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Answer
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Hint: Diethyl ether is also known as simple ether is an organic compound represented by the chemical formula ${{({{C}_{2}}{{H}_{5}})}_{2}}O$ and also we know that ${{C}_{2}}{{H}_{5}}$ is ethyl group so it can also be written in abbreviated form i.e. ${{(Et)}_{2}}O$. It is colorless and highly volatile in nature.

Complete step by step answer:
The word isomer is derived from two Greek words called iso + mer where iso means equal and mer means parts i.e. equal parts. Isomers are defined as those compounds which have the same chemical formula but a different arrangement of molecules and the phenomenon of isomers is known as isomerism.
Isomers are generally of two types: Structural isomerism and Geometrical isomerism. Structural isomers are also known by the name constitutional isomerism and it is of five types:
1. Chain isomerism: In this isomers are different in the branching of chains.
2. Position isomers: Isomers differ with the arrangement of attachment of functional groups to a different carbon atom.
3. Functional isomerism: Those which have the same chemical formula but a different functional group.
4. Metamerism: Due to the presence of different alkyl chains on each side of functional groups.
5. Tautomerism: Which differs in the position of proton and electron.
Now from the above discussion, we come to know that isomer has the same molecular formula
So, the correct answer is “Option A”.

Note: In the constitutional type of isomerism the functional group and the atoms in the molecules of these isomers are linked in different ways. Whereas in geometrical isomerism compounds have the same chemical formula but different orientations of the atoms in three-dimensional space.