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Assertion : Cyclopentadienyl anion is mu...

Assertion : Cyclopentadienyl anion is much more stable than allyl anion.
Reason : Cyclopentadienyl anion is aromatic in character.

A

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

B

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

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Allyl anion is stable because of 2 resonating structures
Cyclopentadienyl anion is much more stable because it is aromatic in character
Delocalisation of `6pi` electrons
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Knowledge Check

  • Assertion:Cyclolpentadienyl anion is much more stable than allyl cation Reason:Cyclopentadienyl anion is aromatic in character

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion
    C
    if assertion is true but reason is false
    D
    If the assertion and reason both are false

  • Assertion: Cyclopentadienyl anion is aromatic in nature. Reason: Cyclopentaddienyl anion has six pi electrons.

    A
    If both assertion and reson are true and reason is the correct explanation of assertion
    B
    If both assertion and reason are true but reason is not the correct explanation of assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • Which of the following anions are more stable than benzyl anion ?

    A
    B
    C
    D
    • ERRORLESS-HYDROCARBONS-ASSERTION & REASON
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    2. Assertion : Tropylium cation is aromatic in nature Reason : The only...

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    3. Assertion:Cyclobutane is less stable than cyclopentane. Reason : Pre...

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    4. Assertion : Pyrrole is an aromatic heterocyclic compound Reason : ...

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    5. Assertion : CH(4) does not react Cl(2) in dark. Reason: Chlorinat...

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    6. Assertion : Alkyl benzene is not prepared by Friedel- Crafts alkylatio...

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    7. Assertion : 2-Bromobutane on reaction with sodium ethoxide in ethanol ...

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    8. Assertion: Styrence on reaction with HBr gives 1-bromo-1-phenylethane ...

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    9. Assertion :Iodination of alkanes is reversible Reason:Iodination is ...

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    10. Assertion:Freezing point of neopentane is more than n-pentane. Reaso...

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    11. Assertion : The presence of Ag^(+) enhance the solubility of alkenes i...

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    12. Assertion : Propene reacts with HBr in presence of benzoyl peroxide to...

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    13. A) Addition of HBr on 2-butene gives two isomeric products. R) Addit...

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    14. Assertion:Aryl halides are less reactive towards substitution of halog...

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    15. Assertion:Benzene is a solvent for the Friedel Craft's alkylation of b...

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    16. Assertion : [10]Annulene is not aromatic though it contains Huckel num...

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    17. Assertion : Benzene forms benzene sulphonic acid with fuming H2SO4 at ...

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    18. Assertion :Activating groups are electron donors. Reason: Nitroso gr...

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