Home
Class 12
CHEMISTRY
Iron is rendered passive by treatment wi...

Iron is rendered passive by treatment with

A

`H_2SO_4`

B

`H_3PO_4`

C

`HCl`

D

`HNO_3`

Text Solution

Verified by Experts

The correct Answer is:
D
The inertness exhibited by metals under conditions in which chemical activity is expected is known as passivity. The phenomenon of passivity is explained by assuming the formaion of a thin film of oxide on the surface of the metal which prevents the action of the reagent. The concentrated nitric acid makes metals such as `Fe,Co,Ni,Cr,Al`. etc., passive.
Promotional Banner

Topper's Solved these Questions

  • D AND F BLOCK ELEMENTS

    CENGAGE CHEMISTRY ENGLISH|Exercise Archives Assertion Reasoning|3 Videos

  • D AND F BLOCK ELEMENTS

    CENGAGE CHEMISTRY ENGLISH|Exercise Archives Integer|2 Videos

  • D AND F BLOCK ELEMENTS

    CENGAGE CHEMISTRY ENGLISH|Exercise Archives Multiple Correct|8 Videos

  • COORDINATION COMPOUNDS

    CENGAGE CHEMISTRY ENGLISH|Exercise Archives Subjective|18 Videos

  • ELECTROCHEMISTRY

    CENGAGE CHEMISTRY ENGLISH|Exercise Archieves Subjective|35 Videos

Similar Questions

Explore conceptually related problems

Give reason for the following: Iron is rendered passive with fuming nitric acid.

Give reasons for the following: Iron is rendered passive with fuming nitric acid.

Fe is made passive by :

Sodium fusion extract, obtained from aniline, on treatment with iron (II) sulphate and H_2SO_4 in the presence of air gives a Prussian blue precipitate. The blue colour is due to the formation of

The following question is related to Iron: Name the acid with which iron is rendered passive .

I^131 is used for the treatment of

What is passive iron ?

Assertion : Secondary treatement of sewage is also called biological treatment while primary treatment is called physical treatment. Reason : Primary sewage treatment depends only upon sedimentation properties of materials present in sewage and filtration.

Which of the following substances are absorbed by passive transport ?

Secondary treatment of sewage

CENGAGE CHEMISTRY ENGLISH-D AND F BLOCK ELEMENTS-Archives Single Correct
  1. How many unpaired electrons are present in Ni^(2+) cation? (At. No. = ...

    Text Solution

    |

  2. In the metallurgy of iron, when limestone is added to the blast furnac...

    Text Solution

    |

  3. Iron is rendered passive by treatment with

    Text Solution

    |

  4. The types of bonds present in CuSO4 .5H2O are only

    Text Solution

    |

  5. Zinc-copper couple that can be used as a reducing agent is obtained by

    Text Solution

    |

  6. The reaction which proceeds in the forward direction is

    Text Solution

    |

  7. Which of the following is formed when execess of KCN is added to an aq...

    Text Solution

    |

  8. An aqueous solution of FeSO4.Al2(SO4)3 and chrome alum is heated with ...

    Text Solution

    |

  9. Among the following sulphides , the one that does not dissolve in dil ...

    Text Solution

    |

  10. Ammonium dichromate is used in some fire works. The green coloured pow...

    Text Solution

    |

  11. Which of the following compounds is expected to be coloured?

    Text Solution

    |

  12. Which of the following is an organometallic compound ?

    Text Solution

    |

  13. In the dichromate anion (Cr2O7^(2-))

    Text Solution

    |

  14. On heating ammonium dichromate, the gas evolved is

    Text Solution

    |

  15. Which of the following species has an atom with +6 oxidation state?

    Text Solution

    |

  16. Anhydrous feric chloride is prepared by:

    Text Solution

    |

  17. When MnO(2) fused with KOH, a coloured compound is formed . The produc...

    Text Solution

    |

  18. (NH4)2Cr2O7 on heating gives a gas which is also given by

    Text Solution

    |

  19. Which of the following pair of compounds is expected to exhibit same c...

    Text Solution

    |

  20. A solutionf of a metal ion when treated with KI gives a red precipitat...

    Text Solution

    |