Home
Class 12
CHEMISTRY
Assertion (A): Enthalpy of graphite is l...

Assertion (A): Enthalpy of graphite is lower than that of diamond.
Reason (R ) : Entropy of graphite is lower than that of diamond.

A

If both (A) and (R) are correct and (R) is the correct reason for (A).

B

If both (A) and (R) are correct but (R) is not the correct explanation for (A).

C

If (A) is true but (R) is false

D

If both (A) and (R) are false.

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Assertion Reason Type Question Set-2|1 Videos
  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Matric Matching Type Questions|3 Videos
  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Objective Question Level B Set II|8 Videos
  • CHEMICAL KINETICS

    OP TANDON|Exercise LINKED COMPRESHENSION TYPE QUESTIONS ( SECTION-VI)|4 Videos
  • CLASSIFICATION AND NOMENCLATURE OF ORGANIC COMPOUNDS

    OP TANDON|Exercise INTEGER|2 Videos

Similar Questions

Explore conceptually related problems

Assertion: Standard enthalpy of graphite is lower than that of diamond. Reason : Standard enthalpy of elements is taken to be zero arbitrarily.

Graphite is denser than diamond.

Graphite is denser than diamond

Why graphite is used as anode but not diamond ?

Assertion: The first ionisation enthalpy of aluminium is lower than that of magnesium. Reason : Ionic radius of aluminium is smaller than that of magnesium.

The value of DeltaH_("transition") of C (graphite) rarr C (diamond) is 1.9 kJ/mol at 25^(@)C . Entropy of graphite is higher than entropy of diamond. This implies that :

Assertion (A) : Graphite is chemically more reactive than diamond . Reason (R) : Diamond is very hard but fraphite si soof .

OP TANDON-Chemical Thermodynamics and Thermochemistry-Assertion Reason Type Question
  1. (A) As temperature increases, heat of reaction also increases for exot...

    Text Solution

    |

  2. (A) All exothermic reactions are spontaneous at room temperature. ltBr...

    Text Solution

    |

  3. Assertion (A): Enthalpy of graphite is lower than that of diamond. R...

    Text Solution

    |

  4. Assertion: The enthalpy of formation of gaseous oxygen molecules at 29...

    Text Solution

    |

  5. Assertion (A): Heat of neutralisation for both HNO(3) and HCI with NaO...

    Text Solution

    |

  6. Assertion (A): Decrease in free energy causes spontaneous reaction ...

    Text Solution

    |

  7. Assertion (A): May endothermic reactions that are not spontaneous at ...

    Text Solution

    |

  8. Assertion (A): The enthalpy of formation of H(2)O(l) is greater than t...

    Text Solution

    |

  9. Assertion (A): For a particular reaction, heat of combustion at consta...

    Text Solution

    |

  10. Assertion (A): The enthalpy of both graphite and diamond is taken to ...

    Text Solution

    |

  11. Statement -1: heat of neutralistion of perchoric acid ,HClO(4) with Na...

    Text Solution

    |

  12. Assertion (A): The Heat of ionisation of water is equal to the heat o...

    Text Solution

    |

  13. Assertion (A): The enthalpy of formation of HCI is equal to the bond e...

    Text Solution

    |

  14. Assertion (A): Pressure, volume, and temperature are all extensive pro...

    Text Solution

    |

  15. Assertion (A): When a gas at high pressure expands against vacuum, th...

    Text Solution

    |

  16. Assertion: When a real gas is allowed to expand adiabatically through ...

    Text Solution

    |

  17. Assertion (A): Internal energy change in a cyclic process is zero. ...

    Text Solution

    |

  18. Assertion (A): An exothermic process, non-spontaneous at high temperat...

    Text Solution

    |

  19. Assertion (A): There is no reaction known for which DeltaG is positive...

    Text Solution

    |

  20. Assertion (A): A reaction which is spontaneous and accompained by decr...

    Text Solution

    |