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Consider the following fcc unit cells ch...

Consider the following fcc unit cells choose the correct option

A

I and II represent tetrahedral holes

B

II, III and IV represent tetrahedral holes

C

I and II represent octahedral holes

D

I, II and IV represent octahedral holes

Text Solution

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The correct Answer is:
C
Examine the nearest number of neighbours in (I) and (II) . The number is six which is octahedral .
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DISHA PUBLICATION-THE SOLID STATE-EXERCISE -1 : CONCEPT BUILDER
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  5. A mineral MX(2) crystallizes in ccp of M^(2+) ions whereas X^(-) ions ...

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  6. Polonium crystallizes in a simple cubic strtucture. The edge of the u...

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  7. CsBr has bcc stucture with edge length 4.3 pm .The shortest interionic...

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  8. In an ionic compound A^(+)X^(-), the radii of A^(+) and X^(-) ions ar ...

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  9. The coordination number X (---) of each ion in KBr is changed to Y (--...

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  10. Each edge of a cubic unit cell is 400pm long. If atomic mass of the e...

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  11. The atomic radius of strontium (Sr) is 215 p m and it crystallizes wit...

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  13. An element having an atomic radius of 0.14 nm crystallises in a fcc un...

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  14. Ammonium chloride crystallizes in a body centred cubic lattice with ed...

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  15. The edge length of a face centred cubic cell of an ionic substance is ...

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  16. An element (atomic mass = 100 g//mol) having bcc structure has unit ce...

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  17. If the pressure on a NaCI structure in increases , then its coordinati...

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  18. An elementoccurring in the bcc structure has 12.08 xx 10^(23) unit cel...

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  19. The number of atoms in 100 g of an FCC crystal with density d = 10 g//...

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  20. The radii of Na^+ and Cl^- ions are 95 pm and 181 pm respectively. The...

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