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Assertion : An important feature of fluo...

Assertion : An important feature of fluorite structure is that cations being large ib size occupy `FC C` lattice points, the formula unit `AB_(2)` (A cation, B anion)
Reason: There are `6` cations and `12` anions per `FC C` unit cell of the flucrite structure

A

If both assertion and reason are true and the reason is the correct explanation of the assertion

B

If both assertion and reason are true but reason is not the correct explanation of the assertion

C

If assertion is true bur reason is false

D

If assertion is false bur reason is true

Text Solution

Verified by Experts

The correct Answer is:
c
Assertion true
Reason is `FC C` lattice there are `4` cations per unit cells and `8` anious for flacrin structure
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A2Z-SOLID STATE-Section B - Assertion Reasoning
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  2. Assertion :The close packing of atoms in cubic structure is in the ord...

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  4. Assertion : In hexagonal close packing vaccant space are between three...

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  5. Assertion : Antiferromagnetic on heating to high temperature become pa...

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  6. Assertion : Stoichimetric compounds obey the law of constact compositi...

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  7. Assertion :Bragg's equation has no solution, if n = 2 and lambda gt d...

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  8. Assertion : Na(2)O adopes structure similar to that of CaF(2) but pos...

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  9. Assertion : Solids having more F-centre possess intense colour Reas...

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  10. Assertion (A) : Triclinic systeam is the most unsymmetrical systeam. ...

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  11. Assertion (A) : Frenkel defects are shown by AgX. Reason (R ) : Ag^(...

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  12. Assertion : In AgCI crystal, frenkel defect can be observed Reason:A...

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  13. Assertion : A crystal having fcc structure is more closely packed then...

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  14. Assertion : ZnO becomes yellow when it is beated Reason: NaCI become...

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  15. Assertion (A) : Covalent crystals have higher melting point. Reason ...

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  16. Assertion : CsCI has body - centred cunic arrangement Reason: CsCI ...

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  17. Assertion :In NaCIcrystal each Na^(+) ion is tourching 6 CI^(-) ion bu...

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  18. Assertion (A) : In the rock salt type structure, all the OV(s) are occ...

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  19. Assertion : An important feature of fluorite structure is that cations...

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  20. Assertion : The octahedral viods have double the size of the tetrabed...

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