Home
Class 12
CHEMISTRY
Mark the false statement...

Mark the false statement

A

A salt bridge is used to eliminate liquid junction potential

B

The Gibbs free energy change, `DeltaG` is related with electromotive force (E), as `DeltaG=-nFE`

C

Nernst equation for single electrode potential is `E=E^(o)-(RT)/(nF)ln" "a_(M^(n+))`

D

The efficiency of a hydrogen oxygen fuel cell is 23%

Text Solution

Verified by Experts

The correct Answer is:
C
Practically only 60-70% efficiency has been attained.
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    ERRORLESS |Exercise Ordinary Thinking Objective Questions (Corrosion)|6 Videos

  • ELECTROCHEMISTRY

    ERRORLESS |Exercise Critical Thinking Objective Question|16 Videos

  • ELECTROCHEMISTRY

    ERRORLESS |Exercise Ordinary Thinking Objective Questions (Conductor And conductance)|59 Videos

  • D & P-BLOCK ELEMENTS

    ERRORLESS |Exercise JEE Section (Numeric answer type questions)|2 Videos

  • ENVIRONMENTAL CHEMISTRY

    ERRORLESS |Exercise CRITICAL THINKING (Objective question )|16 Videos

Similar Questions

Explore conceptually related problems

Mark the following statements as True or False. Correc the false statements Insects have spiracles on the lower surface of the body.

Mark the following statements as True or False. Correc the false statements Oxygen breaks down glucose outside the cells of organisms

Mark the following statements as True or False. Correc the false statements Frogs can breath through their skin as well as lungs

Mark the following statements as True or False. Correc the false statements Exhaled air has more percentage of CO_(2) than inhaled air.

Mark whether the following statements are true or false. Rewrite the false statements are correcting them. (i) Collagen fibres are inelastic in nature.

Mark whether the following statements are true or false. Rewrite the false statements are correcting them. (ii) Ligaments attach muscle with bone.

Mark whether the following statements are true or false. Rewrite the false statements are correcting them. (iii) Adipose tissue prevents the loss of heat from the body

ERRORLESS -ELECTROCHEMISTRY-Ordinary Thinking Objective Questions (Cell constant and Electrochemical cells)
  1. In dry cell , reaction which takes place at the anode is .

    Text Solution

    |

  2. The units of cell constant are ......

    Text Solution

    |

  3. Mark the false statement

    Text Solution

    |

  4. The standard cell potential of Zn|zn((aq))^(2+)"||"Cu((aq))^(2+)|Cu ce...

    Text Solution

    |

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

    Text Solution

    |

  6. Calculate the cell constant if the specific conductance of a Solution ...

    Text Solution

    |

  7. If the specific conductance and conductance of a solution are same, th...

    Text Solution

    |

  8. Which of the following reaction is possible at anode ?

    Text Solution

    |

  9. In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to :

    Text Solution

    |

  10. The reduction potential of hydrogen half cell will be negative if :

    Text Solution

    |

  11. The electrode reactions that takes place at the anode of CH(4)-O(2) fu...

    Text Solution

    |

  12. The electrochemical cell stops working after some time because:

    Text Solution

    |

  13. The cathode reaction in electrolysis of dilute sulphuric acid with Pla...

    Text Solution

    |

  14. If the half-cell reaction A+e^(-)toA^(-) has a large negative reductio...

    Text Solution

    |

  15. At 25^@ C specific conductivity of a normal solution of KCI is 0. 00...

    Text Solution

    |

  16. The tendency of an electrode to lose electrons is known as

    Text Solution

    |

  17. What is the cell reaction occurring in Daneill cell (galvanic cell) ?

    Text Solution

    |

  18. Anode reaction of a fuel cell is:-

    Text Solution

    |

  19. The cell reaction Zn+Cu^(2+)rarrZn^(2+)+Cu, is best represented by-

    Text Solution

    |

  20. A conductivity cell has been calibrated with a 0.01 M 1:1 electrolyte ...

    Text Solution

    |