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प्रश्न
Which of the following statements is not true?
विकल्प
Paramagnetic substances are weakly attracted by magnetic field.
Ferromagnetic substances cannot be magnetised permanently.
The domains in antiferromagnetic substances are oppositely oriented with respect to each other.
Pairing of electrons cancels their magnetic moment in the diamagnetic substances.
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उत्तर
Ferromagnetic substances cannot be magnetised permanently.
Explanation:
Ferromagnetic species are strongly attracted in the magnetic field and can be permanently magnetised.
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संबंधित प्रश्न
Explain the following with suitable examples:
Paramagnetism
Explain the following with suitable examples:
Ferrimagnetism
Explain the following with suitable examples:
Antiferromagnetism
Give reasons:Ferrimagnetic substances show better magnetism than antiferromagnetic substances.
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)
The BH curve for a ferromagnetic material is shown in the figure. The material is placed inside a long solenoid which contains 1000 turns/cm. The current that should be passed in the solenonid to demagnetize the ferromagnet completely is
What happens to the domains in a ferromagnetic material in the presence of external magnetic field?
Assertion: On heating ferromagnetic or ferrimagnetic substances, they become paramagnetic.
Reason: The electrons change their spin on heating.
Fe3O4 (magnetite) is an example of ___________.
Which of the following arrangements shows schematic alignment of magnetic moments of antiferromagnetic substances?
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:
The correct order of bond strength is ______.
Which of the following statements are correct?
- Electric monopoles do not exist whereas magnetic monopoles exist.
- Magnetic field lines due to a solenoid at its ends and outside cannot be completely straight and confined.
- Magnetic field lines are completely confined within a toroid.
- Magnetic field lines inside a bar magnet are not parallel.
- χ = -1 is the condition for a perfect diamagnetic material, where x is its magnetic susceptibility.
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?
Which of the following is not paramagnetic?
Which one of the following compounds is diamagnetic and colourless?
The calculated spin only magnetic moment of Cr2+ ion is ______.
