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Fe(3)O(4) is ferrimagnetic at room tempe...

`Fe_(3)O_(4)` is ferrimagnetic at room temperature but at 850K it becomes::

A

diamagnetic

B

ferromagnetic

C

non-magnetic

D

paramagnetic

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MODERN PUBLICATION-SOLID STATE-EXERCISE
  1. Calculate the mass of 2.5 mole of naphthalene.

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  2. An alloy of copper silver and gold is found it have copper constitutin...

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  3. Fe(3)O(4) is ferrimagnetic at room temperature but at 850K it becomes:...

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  4. An example of body centred cube is

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  5. The packing fraction for a body centred cube is

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  6. In the body centered cubic unit cell and simple unit cell, the radius...

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  7. In the spinel structur, oxides ions are cubical-closet packed whereas ...

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  8. The most unsysmmetrical and symmeterical systems are, respectively:

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  9. The unit cell with parameter alpha=beta=gamma=90^(@) and a=b ne c is

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  10. The number of atoms present in a hexagonal close-packed unit cell is:

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  11. In corrundum, oxide ions are arranged in hcp arrangement and the alumi...

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  12. A minetal of titanium is found to contain calcium ions at the corners,...

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  13. The number of tetrahedral and octahedral holes in a hexagonal primitiv...

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  14. In an atomic bcc lattie what fraction of edge is not covered by atom...

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  15. A Metal crystallizes in fcc lattice and the edge of the unit cell is 6...

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  16. In which of the following structures, the anion has maximum coordinati...

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  17. In a face centered cubic arrangement of A and B atoms whose A atoms ar...

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  18. In which of the following pair, both the crystals are not of the same ...

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  19. Which of the following statements is not true about crystalline solids...

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  20. What is the ratio by mass of Na and Cl in sodium chloride (NaCl) ?

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