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Which can show an electronic effect?
A.Aldehydes
B.Ketones
C.Alkenes
D.Ethers

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Last updated date: 28th Feb 2024
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IVSAT 2024
Answer
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Hint: To answer this question, you should recall the concept of electronic effect. This effect influences the structure, reactivity, or properties of the molecule but is neither a traditional bond nor a steric effect. It is the formation of a dipole in the molecule of an organic compound due to the complete transfer of shared pairs of pi electrons.

Complete Step by step solution:
The instantaneous formation of a dipole in the molecule of an organic compound due to the complete transfer of shared pairs of pi electrons to one of the constituent atoms under the influence of an attacking reagent is referred to as the electromeric effect. This effect can be observed in organic compounds that contain at least one multiple bonds. When the atoms participating in these multiple bonds come under the influence of an attacking reagent, one pi bonding pair of electrons is completely transferred to one of the two atoms. There is the presence of multiple bonds in ketones.

Hence, the correct answer to this question is option B.

Note: You should also know about inductive effect and resonance effect. We can define the resonance effect as the resonance effect can be defined as a chemical phenomenon which is observed in the characteristic compounds having double bonds in the organic compounds. We can define the inductive effect as when an electron-releasing or an electron-withdrawing species is introduced to a chain of atoms (generally a carbon chain), the corresponding negative or positive charge is relayed through the carbon chain by the atoms belonging to it. This causes a permanent dipole to arise in the molecule and is referred to as the inductive effect.
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