Home
Class 11
CHEMISTRY
Assertion: The enthalpy of formation of ...

Assertion: The enthalpy of formation of geseous oxygen molecules at `298K` and under of 1 atm is zero.
Reason: The entropy of formation of gaseous oxygen molecules under the same condition is zero.

A

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

B

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

C

If the 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:
C
It is correct that on touching the ice we feel cold because ice absorb heat from our hand.
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    A2Z|Exercise AIPMT/ NEET Questions|53 Videos

  • CHEMICAL THERMODYNAMICS

    A2Z|Exercise AIIMS Questions|29 Videos

  • CHEMICAL THERMODYNAMICS

    A2Z|Exercise Heat Capacity And Calorimetry|13 Videos

  • CHEMICAL EQUILIBRIUM

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY OF PROPERTIES

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

Assertion(A) : The enthalpy of formation of O_(2) at 1 atmospheric pressure and 298K is zero. Reason(R ) : The enthalpy of formation of all the elements at STP is zero.

"The enthalpy of formation of a compound is equal in magnitude but of opposite sign to the enthalpy of decomposition of that compound under the same conditions". This law was presented by:

Explain the formation of hydrogen, oxygen and nitrogen molecules.

The most easily hydrolysed molecule under S_(N^(1)) condition is:

A2Z-CHEMICAL THERMODYNAMICS-Section B - Assertion Reasoning
  1. Assertion: The enthalpy of formation of geseous oxygen molecules at 29...

    Text Solution

    |

  2. Assertion: We feel cold on touching the ice. Reason: Ice is a solid ...

    Text Solution

    |

  3. Assertion: Entropy of ice is less than water. Reason: Ice has cage-lik...

    Text Solution

    |

  4. Assertion: The heat absorbed during the isothermal expansion of an ide...

    Text Solution

    |

  5. Assertion: Mass and volume are extensive properties. Reason: Mass/vo...

    Text Solution

    |

  6. Assertion: DeltaH and DeltaE are almost the same for the reaction. N(2...

    Text Solution

    |

  7. Assertion: Work and internal energy are not state functions. Reason:...

    Text Solution

    |

  8. Assertion: The zeroth law of thermodynamics was know before the first ...

    Text Solution

    |

  9. Assertion: A non-spontaneous endothermic reaction at room temperature ...

    Text Solution

    |

  10. Assertion (A) : There is a natural asymmetry between converting work t...

    Text Solution

    |

  11. Assertion: Kinetic energy of photoelectrons is directly proportinal of...

    Text Solution

    |

  12. Assertion: An exothermic reaction in principle cannot have zero active...

    Text Solution

    |

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

    Text Solution

    |

  14. Assertion: For any gas DeltaW=-PDeltaV,P represents the external press...

    Text Solution

    |

  15. Assertion: Where a mole of electron is transported across a potential ...

    Text Solution

    |

  16. Assertion: The product of pressure and volume for a fixed amount of ga...

    Text Solution

    |

  17. Assertion: Adsorption is exothermic and spontaneous in spite of the fa...

    Text Solution

    |