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प्रश्न
Explain the following with suitable examples:
Antiferromagnetism
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उत्तर
The presence of unpaired electrons predicts paramagnetism or ferromagnetism in antiferromagnetic substances, despite their net zero magnetic moment.
Antiferromagnetic substances have domain structures similar to ferromagnetic substances but are oppositely orientated. The oppositely orientated domains cancel out each other’s magnetic moments.
Antiferromagnetism comes when magnetic moments align in a compensating fashion, yielding a zero net moment. MnO is a substance of this class.
संबंधित प्रश्न
Define the following term:
Ferromagnetism
Write the type of magnetism observed when the magnetic moments are oppositely aligned and cancel out each other.
Explain the following with suitable examples:
Paramagnetism
Explain the following with suitable examples:
Ferrimagnetism
Give reasons:Ferrimagnetic substances show better magnetism than antiferromagnetic substances.
The complexion [Ni(CN)4]2- is:
Explain why:
(i) Transition elements form coloured compounds.
(ii) Interhalogen compounds are more reactive than their constituent elements.
(iii) Cu+ is diamagnetic but Cu2+ is paramagnetic. (Z = 29)
Pyrolusite ore is _______.
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.
What is magnetic susceptibility?
Compare dia, para and ferromagnetism.
What happens to the domains in a ferromagnetic material in the presence of external magnetic field?
Substances which are weakly repelled in magnetic field are known as ____________.
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 statements is not true?
A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field becuase ______.
Which one of the following homo-diatomic molecule is paramagnetic?
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 ?
The correct order of bond strength is ______.
The value of aluminium susceptibility is 2.2 × 10-5. The percentage increase in the magnetic field if space within a current carrying toroid is filled with aluminium is `"x"/10^4`. Then the value of x is ______.
Among the following ions, which one has the highest paramagnetism?
Give a reason for the following:
Cu+2 salts are paramagnetic, while Cu+ salts are diamagnetic.
