Given below are two statements : Statement I : Hyperconjugation is a permanent effect. Statement II : Hyperconjugation in ethyl cation CH 3 - C + H 2 involves the overlapping of C sp 2 - H 1 s bond with empty 2 p orbital of other carbon. Choose the correct option:

Statement I is correct but statement II is false

Both statement I and statement II are false

Statement I is incorrect but statement II is true

Both Statement I and statement II are true.

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The correct order of the stability of the following compounds based on hyperconjugation is

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Important Questions on Organic Chemistry- Some Basic Principles and Techniques

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The correct order of stability for the following alkoxides is:

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The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, due to

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Which of the following molecules is least resonance stabilized?

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Consider the following compounds

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Hyperconjugation occurs in:

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Chemistry>Organic Chemistry>Organic Chemistry- Some Basic Principles and Techniques>Electronic Effects

Given below are two statements :

Statement I : Hyperconjugation is a permanent effect.

Statement II : Hyperconjugation in ethyl cation $({CH}_{3} - \overset{+}{C} H_{2})$ involves the overlapping of $C_{{sp}^{2}} - H_{1 s}$ bond with empty $2 p$ orbital of other carbon.

Choose the correct option:

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Which of the following alkyl groups shows least positive inductive effect?

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In which of the following molecules, all atoms are coplanar?

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Number of electrophillic centres in the given compound is___

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Which of the following is not explained by hyperconjugation?

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The order of stability among the following alkenes is:

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Among the given species the Resonance stabilised carbocations are:

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Which of the following represents the hyperconjugation effect?

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Which one among the following resonating structures is not correct?

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The most acidic proton and the strongest nucleophilic nitrogen in the following compound

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respectively, are

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The order of stability of the following alkenes with the first being the most stable and last being the least stable is
(i)

{CH}_{3} {CH}_{2} CH = {CH}_{2}

(ii)

{({CH}_{3})}_{2} C = C {({CH}_{3})}_{2}

(iii)

{CH}_{3} CH = C {({CH}_{3})}_{2}

(iv)

{({CH}_{3})}_{2} C = {CH}_{2}

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Which of the following is correct with respect to

- I

effect of the substituent? (

R =

alkyl group)

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Increasing order of stability of the resonance structure is:

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In pyrrole, the electron density is maximum on

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The higher stabilities of tert-butyl cation over isopropyl cation and trans-

2

- butene over propene, respectively, are due to orbital interactions involving

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A tertiary butyl carbocation is more stable than a secondary butyl carbocation because of which of the following?

The correct order of the stability of the following compounds based on hyperconjugation is

Important Questions on Organic Chemistry- Some Basic Principles and Techniques

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