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Assertion-Addition of bromine to trans-2...

Assertion-Addition of bromine to trans-2-butene yields meso-2,3-dibromobutane.
Reason- Bromine addition is an electrophilic addition.

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 assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
B
Addition of `Br_(2)` on trans `-2-` butene gives meso`-2,3-`dibromobutane following anti`-` addition, which is however electrophilic one.
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Addition of bromine to trans-2-butene yields meso-2,3-dibromobutane. Bromine addition is an electrophilic addition.

A) Addition of bromine to trans-but-2-ene yields meso-2,3-dibromo butane. R) Bromine addition to an alkene is an electrophilic addition.

Ionic addition of bromine to cis-2-butene yields:

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A2Z-HYDROCARBONS-Section B - Assertion Reasoning
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  2. Assertion : When double and triple bonds are in conjugation, addition ...

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  3. Assertion-Addition of bromine to trans-2-butene yields meso-2,3-dibrom...

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  4. Assertion : Cyclohexane floats over water. Reason: Cyclohexane alway...

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  5. Assertion :Alkeanes having more than three carbon atoms exhibit chain ...

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  6. Assertion : Cis-1,3 dihydroxy cyclohexane exists in chair conformation...

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  7. Assertion : 2,3- dimethyl but-2-ene decolorizes Br(2) water. Reason:...

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  8. Assertion : Reaction of HCl with But-2- ene in the presence or absence...

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  9. Assertion : Reaction of tert- butychloride with Na gives 2,2,3,3- tetr...

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  10. Assertion : 2,3-dimethyl but-2-ene is more stable than but-2-ene. Re...

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  11. Assertion: Trans-2-chloro propene has higher dipole moment than cis-2-...

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  12. Assertion : Dimethyl sulphide is commonly used for the reduction of a...

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  13. Assertion : Iodination of alkane is carried out in presence of iodic a...

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  14. Assertion: C(6)H(6) does not decolourize Br(2) water. Reason: All t...

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  15. Assertion : Tertiary butyl benzene on oxidation give benzoic acid. R...

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  16. Assertion: Benzene is reactive while inorganic benzene is unreactive ...

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

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  18. Assertion : Tropylium cation is aromatic in nature Reason : The only...

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  19. Assertion : CH(3)-C-=C-CH(3) is more reactive for electrophilic additi...

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  20. Assertion : Addition of HBr in the presence of peroxide on 1-methyl c...

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