Home
Class 12
CHEMISTRY
Assertion (A) Reaction of 1 - butene wit...

Assertion (A) Reaction of 1 - butene with HBr gives 1 - bromobutane as major product.
Reason ( R) Addtion of hydrogen halides to alkenes proceeds according to Markownikoff's rule.
The correct answer is

A

A) and (R) are correct, (R) is the correct explanation of(A)

B

(A) and (R) are correct but (R) is not the correct explanation of (A)

C

(A) is correct but (R) is not correct

D

(A) is not correct but (R) is correct

Text Solution

Verified by Experts

The correct Answer is:
D

1 - butene reacts with HBr to form 1 - bromo butane as major product according to Markovnikov's rule.
Promotional Banner

Topper's Solved these Questions

  • MOLE CONCEPT

    SIA PUBLICATION|Exercise MCQ|17 Videos
  • ORGANIC CHEMISTRY-II

    SIA PUBLICATION|Exercise MCQ|136 Videos

Similar Questions

Explore conceptually related problems

(A) : Reaction of 1-butene with HBr gives 1-bromobutane as major product (R ) : Addition of hydrogen halides to alkenes proceeds according to Markovnikov's rule

(A) : Propene reacts with HBr to give isopropyl bromide. (R ) : Addition of hydrogen halide to alkenes follows Markownikoff's rule

Assertion (A) Propene on addition with hydrogen bromide in the presence of peroxide gives 1-bromopropane as the major product. Reason (R ) 1-bromopropane is the major product because it is formed through the stable carbocation. The correct answer is

(A) Addition of HBr on but-2-ene gives two structural isomeric products (R) Addition of HBr on but-2-ene follows Markownikoff's rule.

(A) 2-Bromobutane on reaction with sodium ethoxide in ethanol gives 1-butene as a major product (R) 1-Butene is more stable than 2-butene

(A) Styrene on reaction with HBr gives 1-bromo-1-phenyl ethane. (R) Benzyl radical is more stable than alkyl radical

(A) : Thermally hydrogen peoxide is unstable (R) : The peroxy bond length in H_(2)O_(2) molecule is 1.48 A The correct answer is

1-Butene + HBr underset(hv)overset(H_2O_2)(rarr) 1-Bromobutane The above reaction follows

SIA PUBLICATION-ORGANIC CHEMISTRY -I-MCQ
  1. Which of the following reagent is used to find out carbon-carbon multi...

    Text Solution

    |

  2. The two bonds N=O and N--O in H(3) CNO(2) are of same bond length due ...

    Text Solution

    |

  3. Assertion (A) Reaction of 1 - butene with HBr gives 1 - bromobutane as...

    Text Solution

    |

  4. The product (Z) of the following reaction is

    Text Solution

    |

  5. What are the shapes of ethyne and methane?

    Text Solution

    |

  6. What is Z in the following reaction? CH(3)-CH(2)-CO(2)Na^(+)overset(“ ...

    Text Solution

    |

  7. Which one of the following gives sooty flame on combustion?

    Text Solution

    |

  8. C(2)H(6) overset(450^(@)C)toC(2) H(4)+H(2) Above reaction is called ...

    Text Solution

    |

  9. In which of the following properties, the two enantiomers of lactic ac...

    Text Solution

    |

  10. Match the following

    Text Solution

    |

  11. Which of the following statements is not correct?

    Text Solution

    |

  12. Different conformations of the same molecule are called

    Text Solution

    |

  13. The chlorination of ethane is an example for which type of the followi...

    Text Solution

    |

  14. C(6)H(6) +O(3)to Xoverset(Zn//H(2)O)to1 Y , X and Y are respectively

    Text Solution

    |

  15. Which one of the following exhibits enantiomerism?

    Text Solution

    |

  16. Assertion (A) Cyclohexane is the most stable cycloalkane. Reason (R)...

    Text Solution

    |

  17. Diels - Alder reaction will not take place with which of the following...

    Text Solution

    |

  18. In which of the following, ortho/para substitution by an electrophile ...

    Text Solution

    |

  19. Which one of the following of 2,3-butane diol is enantiomeric?

    Text Solution

    |

  20. The two enantiomers of secondary butyl chloride differ from each other...

    Text Solution

    |