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प्रश्न
Alkenes 
and carbonyl compounds 
, both contain a π bond but alkenes show electrophilic addition reactions whereas carbonyl compounds show nucleophilic addition reactions. Explain.
उत्तर
Carbonyl group is polar in nature. Due to larger electronegativity of oxygen as compared to carbon, carbon acquires partial positive charge while O acquires partial negative charge.
Because of slight positive charge on C atom, it is attacked by nucleophiles and, therefore, undergoes nucleophilic addition reaction.
Ethylenic double bond is a non-polar bond and is a source of electrons. Therefore, it is attacked by electrophiles and undergoes electrophilic addition reactions.
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संबंधित प्रश्न
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Hint: Consider steric effect and electronic effect.
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What is meant by the following term? Give an example of the reaction in the following case.
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\[\ce{Carbonyl compound + MeOH <=>[HCl] acetal}\]
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Acetaldehydedimethylacetal
