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Which of the following is ferromagnetic ...

Which of the following is ferromagnetic compound ?

A

`BaTiO_(3)`

B

`K_(4)[Fe(CN)_(6)]`

C

`Pb_(2)O_(3)`

D

none of these

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The correct Answer is:
D
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AAKASH SERIES-SOLIDS STATE-PRACTICE EXERCISE
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  5. The electron can flow from electronic band to conduction band if theel...

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  6. The following substance will be yellow when hot and white when cold

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  7. At room temperature all crystals have

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  8. The conductivity values in MnO is in the order of

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  9. Which of the following is ferromagnetic compound ?

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  10. Among the following in which conductivity decreases with increase in t...

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  11. The nature of NiO at 250^(@)C

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  12. The number of unit cells in 58.5 g of NaCl is approximately

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  13. The 8:8 type of  packing is present in

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  14. Packing fraction in a body - centred cubic cell of crystals is

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  15. When electrons are trapped into the crystal in anion vacancy, the defe...

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  16. The radius of Na^(+) is 95 pm and that of CI^(-) ion is 181 pm. Hence ...

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  17. If the distance between Na+ and Clions in NaCl crystal is 'a'pm, what ...

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  18. When LiCl is doped with Li vapours the colour developed is

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  19. The appearance of colour in solid alkali metal halides is generally du...

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  20. In which of the following crystal structure the void efficiency is 32%...

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