Home
Class 12
CHEMISTRY
The cavities in teeth is often filled wi...

The cavities in teeth is often filled with alloy of metals to avoid bacterial infections. However, when a person with dental filling ehew an active metal like aluminium foil acceidently, he experiences severe pain in teeth. The pain is due to a spontaneous discharge of a galvanic cell reaction which is set inside the mouth of person. The active metal serve as anode and dental filling act as inert electrode on which reduction of `O_(2)` gas takes place.
`E_(Al^(3+)|Al)^(@)=-1.66` volt: `E_(O_(2),H^(+)|H_(2)O)^(@)=+1.23` volt
What is the net cell reaction assuming acidic conditions in the mouth?

A

`4Al(s)+3O_(2)(g)+6H_(2)Orarr4Al(OH)_(3)(s)`

B

`4Al(s)+2O_(2)(g)+8H^(+)(aq)rarr4Al^(3+)+4H_(2O`

C

`4Al(s)+3O_(2)(g)+12H^(+)(aq)rarr4Al^(3+)(aq)+6H_(2)O`

D

`4Al(s)+3O_(2)(g)rarr2Al_(2)O_(3)(s)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTY

    GRB PUBLICATION|Exercise Match the column type|16 Videos

  • ELECTROCHEMISTY

    GRB PUBLICATION|Exercise Subjective type|39 Videos

  • ELECTROCHEMISTY

    GRB PUBLICATION|Exercise Multiple objective type|33 Videos

  • D-BLOCK ELEMENTS

    GRB PUBLICATION|Exercise Subjective Type|18 Videos

  • ENVIRONMENTAL CHEMISTRY

    GRB PUBLICATION|Exercise Straight objective type|40 Videos

Similar Questions

Explore conceptually related problems

Which of the following is an alloy of a metal and a non-metal

Reaction With Active Metals

A reaction in which a more active metal displaces a less active metal from the solution of its salt is called a ____ reaction.

A pain reliver used form sever pain like post - operative pain or pain due to terminal cancer :

Metal of which foil was used in Rutherted experiment ?

GRB PUBLICATION-ELECTROCHEMISTY-Comprehension type
  1. Copper reduced NO(3)^(-) into NO and NO(2) depending upon cone. Of HNO...

    Text Solution

    |

  2. Accidentally chewing on a stray fragmet of aluminium foil can causes a...

    Text Solution

    |

  3. The cavities in teeth is often filled with alloy of metals to avoid ba...

    Text Solution

    |

  4. Electrode potential data are used for predicting fessibility of any pr...

    Text Solution

    |

  5. Electrode potential data are used for predicting fessibility of any pr...

    Text Solution

    |

  6. Ag^(+)(aq)+e^(-)rarrAg(s) E^(@)=0.80V Cu^(2+)(aq)+2e^(-)rarrCu(s) E^...

    Text Solution

    |

  7. Ag^(+)(aq)+e^(-)rarrAg(s) E^(@)=0.80V Cu^(2+)(aq)+2e^(-)rarrCu(s) E^...

    Text Solution

    |

  8. Ag^(+)(aq)+e^(-)rarrAg(s) E^(@)=0.80V Cu^(2+)(aq)+2e^(-)rarrCu(s) E^...

    Text Solution

    |

  9. Rh^(03+)(aq)+3e^(-)rarrRh(s) E^(@)=0.80V Cu^(+)(aq)+e^(-)rarrCu(s) E...

    Text Solution

    |

  10. Rh^(03+)(aq)+3e^(-)rarrRh(s) E^(@)=0.80V Cu^(+)(aq)+e^(-)rarrCu(s) E...

    Text Solution

    |

  11. Al^(3+)(aq)+3e^(-)rarrAl(s) E^(@)=-1.66V Mn^(2+)(aq)+2e^(-)rarrMn(s)...

    Text Solution

    |

  12. Al^(3+)(aq)+3e^(-)rarrAl(s) E^(@)=-1.66V Mn^(2+)(aq)+2e^(-)rarrMn(s)...

    Text Solution

    |

  13. 2Al(s)+2Cu^(2+)(aq)rarr2Al^(3+)(aq)+2Cu(s) What is the value of E^(@...

    Text Solution

    |

  14. 2Al(s)+2Cu^(2+)(aq)rarr2Al^(3+)(aq)+2Cu(s) What value should be used...

    Text Solution

    |

  15. Use the standard reduction potentials to find the standard cell potent...

    Text Solution

    |

  16. Based on the standard reduction potentials above, which reaction(s) is...

    Text Solution

    |

  17. 2Ag^(+)(aq)+M(s)rarrM^(2+)(aq)+2Ag,E^(@)=0.940V What is the value of...

    Text Solution

    |

  18. 2Ag^(+)(aq)+M(s)rarrM^(2+)(aq)+2Ag,E^(@)=0.940V Which change will ca...

    Text Solution

    |

  19. 0.1 "mole" AgNO(3) is added in 250 mL of saturated solution of AgCl at...

    Text Solution

    |

  20. 0.1 "mole" AgNO(3) is added in 250 mL of saturated solution of AgCl at...

    Text Solution

    |