Home
Class 12
CHEMISTRY
For the reaction, C+O(2)rarrCO(2), Delta...

For the reaction, `C+O_(2)rarrCO_(2)`, `DeltaH=-393 J`
`2Zn+O_(2) rarr 2ZnO`, `DeltaH=-412J`

A

carbon can oxidise zinc

B

oxidation of carbon is not possible

C

oxidation of zinc is not fessible

D

zinc can oxidise carbon.

Text Solution

Verified by Experts

The correct Answer is:
A

Zinc can lose electrons (O.S. of Zn chagnes from 0 to+2) and carbon can gain electrons (O.S. of C change from 0 to-4). Hence zinc is oxidised by carbon .
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    DINESH PUBLICATION|Exercise SELECTED STRAIGHT OBJECTIVE|67 Videos
  • ELECTROCHEMISTRY

    DINESH PUBLICATION|Exercise MATCH-MATRIX|7 Videos
  • ELECTROCHEMISTRY

    DINESH PUBLICATION|Exercise ADDITIONAL NUMERICAL PROBLEMS FOR PRACTICE|12 Videos
  • D-AND -F BLOCK ELEMENTS

    DINESH PUBLICATION|Exercise BRAIN STORMING MULTIPLE CHOICE QUESTIONS (MCQS)|13 Videos
  • ETHERS

    DINESH PUBLICATION|Exercise (MCQs)|8 Videos

Similar Questions

Explore conceptually related problems

For the reaction, C+O_(2) rarr CO_(2), DeltaH=-393J 2Zn+O_(2) rarr 2ZnO,DeltaH=-412J Which one is correct ?

For the reaction, C+O_(2) rarr CO_(2),DeltaH=-393 J 2Zn + O_(2) rarr 2ZnO, H=-412 J

For the reaction ,3O_(2)rarr 2O_(3),DeltaH=+ve . We can say that :

Given that C+O_(2)rarrCO_(2),DeltaH^(@)=-xKJ and 2CO+O_(2)rarr2CO_(2),DeltaH^(@)=-yKJ The enthalpy of formation of carbon monoxide will be

Calculate the heat of formation of CO using given equations C+O_2rarrCO_2,DeltaH=X CO+1/2O_2rarrCO_2,DeltaH=Y

Calculate the enthalpy of formation of sucrose (C_11H_22O_11) from the following data: (i) C_(12)H_(22)O_(11) + 12O_(2) rarr 12CO_(2) + 11 H_(2)O, DeltaH = -5200.7 kJ mol^(-1) (ii) C + O_(2) rarr CO_(2), DeltaH = -394.5 kJ mol^(-1) (iii) H_(2) + 1/2 O_(2) rarr H_(2)O, DeltaH = H_(2)O, DeltaH = -285.8 kJ mol^(-1) .

DINESH PUBLICATION-ELECTROCHEMISTRY-REVISION QUESTIONS FROM COMPETITIVE EXAMS
  1. On passing 0.1 faraday of electricity through fused sodium chloride, t...

    Text Solution

    |

  2. The standard EMF of a Daniell cell is 1.10 volt. The maximum electric...

    Text Solution

    |

  3. For the reaction, C+O(2)rarrCO(2), DeltaH=-393 J 2Zn+O(2) rarr 2ZnO,...

    Text Solution

    |

  4. When the sample of copper with the zinc impurity is to be purified by ...

    Text Solution

    |

  5. Which of the following reaction is possible at the angle?

    Text Solution

    |

  6. What will be the emf for the given cell ? Pt|H(2)(g,P(1))|H^(+)(aq)|...

    Text Solution

    |

  7. Conductivity (unit siemens) is directly propotional to area of the ves...

    Text Solution

    |

  8. At anode in the electrolysis of fused NaCI:

    Text Solution

    |

  9. The reference calomel electrode is made from which of the following ?

    Text Solution

    |

  10. At cathode, the electrolysis of aqueous Na(3)SO(4) gives

    Text Solution

    |

  11. A smuggler could not carry gold by chemicaly depositing iron on the go...

    Text Solution

    |

  12. The relationship between standard reduction potential of a cell and eq...

    Text Solution

    |

  13. Zn gives H(2) gas with H(2)SO(4) and HCl but not with HNO(3) because

    Text Solution

    |

  14. In electrolysis of NaCl when Pt electrode is taken H(2) is liberated a...

    Text Solution

    |

  15. Which reactions is not fesible

    Text Solution

    |

  16. Corrosion is basically a

    Text Solution

    |

  17. The unit of electrical conductivity is

    Text Solution

    |

  18. The emf of a Daniell cell at 298 K is E(1) Zn|ZnSO(4)(0.01 M)||CuSO(...

    Text Solution

    |

  19. On the basis of information available from the reaction (4)/(3)Al+O(...

    Text Solution

    |

  20. When, during electrolysis of a solution of AgNO(3) 9650 colombs of cha...

    Text Solution

    |