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Question

Select the correct statement
i) Delocalisation of σ-electrons is hyperconjugation
ii) Delocalisation of π and n electrons is resonance
iii) Partial displacement of σ-electrons is inductive effect

A
i and ii
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B
i and iii
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C
ii and iii
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D
i, ii and iii
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Solution

The correct option is A i and ii
In hyperconjugation, stability depends on the delocalization of σelectrons whereas, in resonance, π electrons, negative charge delocalization are important factors of stability.
In inductive effect, the polarity is induced in the compound due to the electronegativity difference between the atoms.
Thus only i and ii are correct.

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