Home
Class 11
CHEMISTRY
The enthalpy of hydrogenation of cyclohe...

The enthalpy of hydrogenation of cyclohexene is `-119.5kJ mol^(-1)`. If resonance energy of benzene is `-150.4kJ mol^(-1)`, its enthalpy of hydrogenation would be `:`

A

`-358.5 "kJ mol"^(-1)`

B

`-508.9 "kJ mol"^(-1)`

C

`-208.1 "kJ mol"^(-1)`

D

`-269.9 "kJ mol"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
Enthalpy of hydrogenation of benzene = 3 x Enthalpy of hydrogenation of cyclohexene - resonance energy of benzene
=3 (-119.5)-(-150.4)=-208.1 kJ `mol^(-1)`.
Promotional Banner

Topper's Solved these Questions

  • HYDROCARBONS

    PRADEEP|Exercise TEST YOUR GRIP (FILL IN THE BLANKS )|20 Videos

  • HYDROCARBONS

    PRADEEP|Exercise CONCEPTUAL Questions|28 Videos

  • HYDROCARBONS

    PRADEEP|Exercise PROBLEMS FOR PRACTICE|3 Videos

  • EQUILIBRIUM IN PHYSICAL AND CHEMICAL PROCESSES

    PRADEEP|Exercise Competition Focus (Jee(Main and advanced)/Medical Entrance) VIII. ASSERTION - REASON TYPE QUESTIONS (TYPE - II)|10 Videos

  • HYDROGEN

    PRADEEP|Exercise COMPETITION FOCUS (Assertion-Reason Type Questions) Type 2|15 Videos

Similar Questions

Explore conceptually related problems

The enthalpy of hydrogenation of cyclohexene is -119.5KJ . If resonance energy of benzene is -150.4KJMol^(-1) , its enthalpy of hydrogenation would be

Enthalpy of hydrogenation of benzene is DeltaH_(1) and for cyclohexene is DeltaH_(2) . The resonance energy of benzene is

PRADEEP-HYDROCARBONS-TEST YOUR GRIP (MULTIPLE CHOICE )
  1. Which one of the following is applicable to the conformations of a hyd...

    Text Solution

    |

  2. Which of the following compounds will exhibit geometrical isomerism?

    Text Solution

    |

  3. Give the IUPAC name of the alkene

    Text Solution

    |

  4. Cis-2-butene and trans-2-butene are:

    Text Solution

    |

  5. 1- Chlorobutane on reaction with alchloic potash gives:

    Text Solution

    |

  6. 1-Butene may be converted to butane by reaction with :

    Text Solution

    |

  7. The compound that undergoes dehydration most readily is

    Text Solution

    |

  8. The order of reactivity of alkenes , underset"(I)"((CH3)2C)=CH2,unders...

    Text Solution

    |

  9. Which of the following gives on ozonolysis both aldehydes and ketones?

    Text Solution

    |

  10. When CH3CH2CHCl2 is treated with NaNH2, the product formed is

    Text Solution

    |

  11. From which one of the following can both ethylene and acetylene be pre...

    Text Solution

    |

  12. Identify the compounds A and B in the following reaction sequence. C...

    Text Solution

    |

  13. What is the decreasing order of strengths of the following bases ? o...

    Text Solution

    |

  14. A gas decolourises alkaline KMnO(4) solution but does not give precipi...

    Text Solution

    |

  15. 2-Hexyne gives trans -2- hexene on treatment with :

    Text Solution

    |

  16. Number of bonds in benzene is

    Text Solution

    |

  17. The enthalpy of hydrogenation of cyclohexene is -119.5kJ mol^(-1). If ...

    Text Solution

    |

  18. Phenyl magnesium bromide reacts with methanol to give :-

    Text Solution

    |

  19. The ortho/para directing group among the following is

    Text Solution

    |

  20. Arrange the following compounds in order of their decreasing reactivit...

    Text Solution

    |