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Question

Methoxy Methane and Ethanol Are


A

Chain isomers

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B

Position isomers

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C

Optical isomers

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D

Functional isomers

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Solution

The correct option is D

Functional isomers


Explanation of correct answer

Option D Functional isomers

  • The compounds having the same molecular formula but different structures and hence different physical and chemical properties are called isomers.
  • The phenomenon of the existence of such compounds is known as isomerism.
  • Functional Isomerism is a type of structural isomerism, in which the molecular formula is identical but functional groups attached to them will be different.
  • The structure of Methoxy methane is

  • The structure of Ethanol is

  • Here, the molecular formula for both Ethanol and Methoxy methane is the same, that is C2H6O, but the functional group is different.
  • Hence option D functional isomers is correct.

Option A Chain isomers

  • Chain Isomerism is a type of structural isomerism in which the molecular formula is identical but there will be a difference in the branching of Carbon.
  • Hence option A chain isomer is incorrect.

Option B Position isomers

  • Position Isomerism is a type of structural isomerism, though the molecular formula is identical, the position of the functional group will be different.
  • Hence option B position isomers is incorrect.

Option C Optical isomers

  • Stereoisomerism can only be observed in three-dimensional space.
  • In such isomers, the orientations of the atoms can be different.
  • Stereoisomerism is in two types Geometric isomerism and Optical isomerism.
  • In geometric isomerism, the atoms have different spatial arrangements, and it is also known as cis-trans isomerism.
  • In optical isomerism, the compounds have similar bonds and have different spatial arrangements forming non-superimposable mirror images.
  • Hence option c optical isomers is incorrect.

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