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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Explain the following with suitable examples: Antiferromagnetism - Chemistry

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प्रश्न

Explain the following with suitable examples: Antiferromagnetism

उत्तर

Antiferromagnetism: Antiferromagnetic substanceshave domain structures similar to ferromagnetic substances, but are oppositely-oriented. The oppositely-oriented domains cancel out each other’s magnetic moments.

Schematic alignment of magnetic moments in antiferromagnetic substances

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पाठ 1: The Solid State - Exercises [पृष्ठ ३२]

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एनसीईआरटी Chemistry [English] Class 12
पाठ 1 The Solid State
Exercises | Q 26.4 | पृष्ठ ३२

संबंधित प्रश्‍न

Iron (z=26) is highly ferromagnetic. Explain.


What type of substances would make better permanent magnets, ferromagnetic or ferrimagnetic. Justify your answer.


Out of [CoF6]3- and [Co(en)3]3+, which one complex is
(i) paramagnetic
(ii) more stable
(iii) inner orbital complex and
(iv) high spin complex
(Atomic no. of Co = 27) 


Give reason for the following :  
Sulphur in vapour state shows paramagnetic behaviour. 


Compare the properties of soft and hard ferromagnetic materials.


All those atoms or molecules which have an odd number of electrons are


When heated to high temperature, ferromagnetic substance changes to ____________.


Assertion: On heating ferromagnetic or ferrimagnetic substances, they become paramagnetic.

Reason: The electrons change their spin on heating.


Which of the following arrangements shows schematic alignment of magnetic moments of antiferromagnetic substances?


A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field becuase ______.


Which one of the following pairs has only paramagnetic species?


Which one of the following homo-diatomic molecule is paramagnetic?


Given below are two statements labelled as Assertion (A) and Reason (R).

Assertion: Magnetic moment values of actinides are lesser than the theoretically predicted values.

Reason: Actinide elements are strongly paramagnetic.

Select the most appropriate answer from the options given below:


Magnetic materials used for making permanent magnets (P) and magnets in a transformer (T) have different properties of the following, which property best matches for the type of magnet required ?


Which of the following statements are correct?

  1. Electric monopoles do not exist whereas magnetic monopoles exist.
  2. Magnetic field lines due to a solenoid at its ends and outside cannot be completely straight and confined.
  3. Magnetic field lines are completely confined within a toroid.
  4. Magnetic field lines inside a bar magnet are not parallel.
  5. χ = -1 is the condition for a perfect diamagnetic material, where x is its magnetic susceptibility.

Match items of List - I with those of List - II:

  List - I   List - II
  (Property)   (Example)
(A) Diamagnetism  (i) MnO
(B) Ferrimagnetism (ii) O2
(C) Paramagnetism (iii) NaCl
(D) Antiferromagnetism (iv) Fe3O4

Choose the most appropriate answer from the options given below:


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