Home
Class 12
CHEMISTRY
At w hich tem perature, Fe(3)O(4) is a f...

At w hich tem perature, `Fe_(3)O_(4)` is a fe rri­magnetic solid converted to a paramagnetic solid ?

A

850 k

B

300 k

C

400 k

D

600 k

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • SOLID STATE

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE -3|22 Videos
  • SOLID STATE

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE -4|45 Videos
  • SOLID STATE

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE -1|94 Videos
  • REVISION EXERCISE

    AAKASH SERIES|Exercise COMPLEX COMPOUNDS|47 Videos
  • SOLIDS STATE

    AAKASH SERIES|Exercise PRACTICE EXERCISE|63 Videos

Similar Questions

Explore conceptually related problems

(A): Fe_(3)O_(4) is ferrimagnetic at room temperature but becomes paramagnetic at 850 K (R): The magnetic moments in Fe_(3)O_(4) ale aligned equally in parallel and antiparallel directions which on heating randomise

Thermite is a mixture of Fe_(2)O_(3) and

(A) All types of magnetic solids become paramagnetic at elevated temperatures. (R) Magnetic solids on heating attains randomisation of spins

Which among FeO and Fe_2O_3 is more basic?

A : K_(4)[Fe(CN_(6))] is diamagnetic R: The alignments of magnetic dipoles are in compensatory to give zero magnetic moment

Magnetically ordered solids transform to paramagnetic state upon heating. Explain.

Assertion: [Fe(CN)_6]^(3-) is weakly paramagnetic while [Fe(CN)_6]^(4-) is diamagnetic Reason: Both [Fe(CN)_6]^(3-) and [Fe(CN)_6]^(4-) involve d^2sp^3 hybridisation. In [Fe(CN)_6]^(3-) singly occupied d-orbital is available but in [Fe(CN)_6]^(4-) paired electrons are present

[Fe(H_(2)O)_(6)]^(3+) is strongly paramagnetic whereas [Fe(CN)_(6)]^(3-) is weakly paramagnetic Explain.

A mixture of Al_(2)O_(3) and Fe_(2)O_(3) can be separated by using

AAKASH SERIES-SOLID STATE-OBJECTIVE EXERCISE -2
  1. If one mole of AgCl is dopped with 10^(-5) mole of AICI3, the number ...

    Text Solution

    |

  2. NaCZ is doped with 2 xx 10^(-2) mole% of SrCl(2) then the number of ca...

    Text Solution

    |

  3. A solid solution of CdBr(2) in AgBr contains

    Text Solution

    |

  4. Schottky defect in crystals is observed when

    Text Solution

    |

  5. Which among the following is likely to have Schottky defect.

    Text Solution

    |

  6. What type of crystal defect is indicated in the diagram below  |{:(Na...

    Text Solution

    |

  7. In NaCl number of Schottky pairs and number of ions per 1 cc is about ...

    Text Solution

    |

  8. In which of the following the conductivity would be in the order of 10...

    Text Solution

    |

  9. The magnetic behavior is different from others in

    Text Solution

    |

  10. Which of the following is correct statement

    Text Solution

    |

  11. The general formula of ferrites is MFe(2)O(4). Where 'M' would not be

    Text Solution

    |

  12. Which of the following are diamagnetic in vapour state( A) Sodium meta...

    Text Solution

    |

  13. At w hich tem perature, Fe(3)O(4) is a fe rri­magnetic solid converted...

    Text Solution

    |

  14. Text Solution

    |

  15. The alignment of magnetic dipoles shown below uarr darr darr uarr darr...

    Text Solution

    |

  16. Correct statements regarding F-centres are (a) they impart magnetic pr...

    Text Solution

    |

  17. The material used in solar cells contains

    Text Solution

    |

  18. To get n-type semiconductor, impurity to be added to silicon should ha...

    Text Solution

    |

  19. The oxide that does not act as an insulator even by a change in temper...

    Text Solution

    |

  20. Observe the following statements (i) Silicon doped with P is a p-type ...

    Text Solution

    |