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(A) Tertiary carbocations are generally ...

(A) Tertiary carbocations are generally formed more easily than primary carbocations.
(R) Hyperconjugation as well as inductive effect due to additional alkyl groups stabilize tertiary cabocations.

A

If both assertion and Reason are true, and reason is the true explanation of the assertion.

B

If both assertion and reason are true, but reason is not the true explanation of the assertion.

C

If assertion is true, but reason is false

D

If both assertion and reason are false

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A
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Under common reaction conditions, a carboncation rearranges to another carbocation of equal or greater stability. For example secondary carbocation will rearrange to a tertiary carbocation. It will not rearrange to a less stable primary carbocation. This generalization is not absolute, and because there is not is a high energy barrier to the rearrangement of carbocations, rearrangement to a less stable cation can occur if it offers the chance to forme a more stable product. In which of the following cations rearrangement takes place?

Under common reaction conditions, a carboncation rearranges to another carbocation of equal or greater stability. For example secondary carbocation will rearrange to a tertiary carbocation. It will not rearrange to a less stable primary carbocation. This generalization is not absolute, and because there is not is a high energy barrier to the rearrangement of carbocations, rearrangement to a less stable cation can occur if it offers the chance to forme a more stable product. In which of the following cations rearrangement takes place most rapidly?

Under common reaction conditions, a carboncation rearranges to another carbocation of equal or greater stability. For example secondary carbocation will rearrange to a tertiary carbocation. It will not rearrange to a less stable primary carbocation. This generalization is not absolute, and because there is not is a high energy barrier to the rearrangement of carbocations, rearrangement to a less stable cation can occur if it offers the chance to forme a more stable product. In the following cation , H//CH_(3) that is most likely to migarte to the positively charged carbon is : H_(3)C^(1)-^(2)underset(OH)underset(|)overset(H)overset(|)C-^(3)underset(H)underset(|)overset(o+)C-^(4)underset(CH_(3))underset(|)overset(H)overset(|)C-^(5)CH_(3)

PRADEEP-ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES TECHNIQUES-Competition Focus (Jee (Main and Advanced)/Medical Entrance) VIII. Assertion-Reason Type Questions
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  2. Statement-1. Beilstein test can be used to detect fluorine in the orga...

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  3. Statement-1. Lassaigne's extract is boiled with dil. HNO(3) before tes...

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  4. Assertion : Butane and 2-methyl butane are chain isomers. Reason : B...

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  5. Assertion :But-1-ene2-Methylprop-1-ene are position isomers. Reason Po...

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  6. Assertion : All the carbon atoms of but-2-ene lie in one plane. Reas...

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  7. Assertion : In CH(2)=C=CH(2), all the carbon atoms are sp^(2)-hybridiz...

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  8. Assertion : A free radical is paramagnetic species. Reason : A free ...

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  9. (A) Tertiary carbocations are generally formed more easily than primar...

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  10. Assertion: Alkyl carbonaions like ammonia have pyramidal shape. Reas...

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  11. (A) Tertiary butyl carbonion is less stable than methyl carbanion. (...

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  12. (A) Allyl free radical is more stable than simple alkyl free radical. ...

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  13. Assertion (A) o-and p-nitrophenol can be separated by steam distillati...

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  14. Assertion : Essential oils are purified by steam distillation. Reaso...

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  15. (A) Oils are purified by steam distillation. (R) The compounds which...

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  16. Assertion : During test for nitrogen with Lassaigne extract on adding ...

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  17. Assertion : NH(2)=overset(S)overset(||)(C)-NH(2) gives red colour in L...

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  18. Assertion (A) Hydrazine contains nitrogen but does not give Lassaigne’...

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  19. Note: In the following questions a statement of assertion followed by ...

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  20. Assertion : Vapour density is the same thing as density. Reason : Mo...

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