Magnetic Properties
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CHXII01:THE SOLID STATE

318859 Which of the following structure represents ferrimagnetism?

1 \(\uparrow \downarrow \uparrow \downarrow \uparrow \downarrow\)
2 \(\uparrow \uparrow \uparrow \uparrow \uparrow\)
3 \(\downarrow \downarrow \downarrow \downarrow \downarrow\)
4 \(\uparrow \uparrow \downarrow \uparrow \uparrow \downarrow\)
CHXII01:THE SOLID STATE

318860 Assertion :
\(\mathrm{Fe}_{3} \mathrm{O}_{4}\) is ferrimagnetic at room temperature but becomes paramagnetic at 850 K.
Reason :
The magnetic moment in \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) are aligned equally in parallel and antiparallel directions which on heating randomise.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII01:THE SOLID STATE

318861 A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field because

1 All the domains get oriented in the direction of magnetic field.
2 All the domains get oriented in the direction opposite to the direction of magnetic field.
3 Domains get oriented randomly.
4 Domains are not affected by magnetic field.
CHXII01:THE SOLID STATE

318862 Anti-ferromagnetic substances possess

1 Large magnetic moment
2 Zero magnetic moment
3 Low magnetic moment
4 Any value of magnetic moment
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CHXII01:THE SOLID STATE

318859 Which of the following structure represents ferrimagnetism?

1 \(\uparrow \downarrow \uparrow \downarrow \uparrow \downarrow\)
2 \(\uparrow \uparrow \uparrow \uparrow \uparrow\)
3 \(\downarrow \downarrow \downarrow \downarrow \downarrow\)
4 \(\uparrow \uparrow \downarrow \uparrow \uparrow \downarrow\)
CHXII01:THE SOLID STATE

318860 Assertion :
\(\mathrm{Fe}_{3} \mathrm{O}_{4}\) is ferrimagnetic at room temperature but becomes paramagnetic at 850 K.
Reason :
The magnetic moment in \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) are aligned equally in parallel and antiparallel directions which on heating randomise.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII01:THE SOLID STATE

318861 A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field because

1 All the domains get oriented in the direction of magnetic field.
2 All the domains get oriented in the direction opposite to the direction of magnetic field.
3 Domains get oriented randomly.
4 Domains are not affected by magnetic field.
CHXII01:THE SOLID STATE

318862 Anti-ferromagnetic substances possess

1 Large magnetic moment
2 Zero magnetic moment
3 Low magnetic moment
4 Any value of magnetic moment
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CHXII01:THE SOLID STATE

318859 Which of the following structure represents ferrimagnetism?

1 \(\uparrow \downarrow \uparrow \downarrow \uparrow \downarrow\)
2 \(\uparrow \uparrow \uparrow \uparrow \uparrow\)
3 \(\downarrow \downarrow \downarrow \downarrow \downarrow\)
4 \(\uparrow \uparrow \downarrow \uparrow \uparrow \downarrow\)
CHXII01:THE SOLID STATE

318860 Assertion :
\(\mathrm{Fe}_{3} \mathrm{O}_{4}\) is ferrimagnetic at room temperature but becomes paramagnetic at 850 K.
Reason :
The magnetic moment in \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) are aligned equally in parallel and antiparallel directions which on heating randomise.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII01:THE SOLID STATE

318861 A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field because

1 All the domains get oriented in the direction of magnetic field.
2 All the domains get oriented in the direction opposite to the direction of magnetic field.
3 Domains get oriented randomly.
4 Domains are not affected by magnetic field.
CHXII01:THE SOLID STATE

318862 Anti-ferromagnetic substances possess

1 Large magnetic moment
2 Zero magnetic moment
3 Low magnetic moment
4 Any value of magnetic moment
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CHXII01:THE SOLID STATE

318859 Which of the following structure represents ferrimagnetism?

1 \(\uparrow \downarrow \uparrow \downarrow \uparrow \downarrow\)
2 \(\uparrow \uparrow \uparrow \uparrow \uparrow\)
3 \(\downarrow \downarrow \downarrow \downarrow \downarrow\)
4 \(\uparrow \uparrow \downarrow \uparrow \uparrow \downarrow\)
CHXII01:THE SOLID STATE

318860 Assertion :
\(\mathrm{Fe}_{3} \mathrm{O}_{4}\) is ferrimagnetic at room temperature but becomes paramagnetic at 850 K.
Reason :
The magnetic moment in \(\mathrm{Fe}_{3} \mathrm{O}_{4}\) are aligned equally in parallel and antiparallel directions which on heating randomise.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
CHXII01:THE SOLID STATE

318861 A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field because

1 All the domains get oriented in the direction of magnetic field.
2 All the domains get oriented in the direction opposite to the direction of magnetic field.
3 Domains get oriented randomly.
4 Domains are not affected by magnetic field.
CHXII01:THE SOLID STATE

318862 Anti-ferromagnetic substances possess

1 Large magnetic moment
2 Zero magnetic moment
3 Low magnetic moment
4 Any value of magnetic moment
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