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The packing efficiency of the two - dime...

The packing efficiency of the two - dimensional square unit cell show below is

A

`39.27%`

B

`68.02%`

C

`74.05%`

D

`78.54%`

Text Solution

Verified by Experts

The correct Answer is:
D

`a=(2sqrt(2)r)`
`P.F.=(2xx T T r^(2))/((2sqrt(2)r)^(2))=(2T T r^(2))/(8r^(2))= (T T)/(4)`
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FIITJEE-SOLID STATE-SOLVED PROBLEMS (OBJECTIVE)
  1. The packing efficiency of the two - dimensional square unit cell show ...

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  2. If 'a' stands for the edge length of the cubic systems: simple cubic,b...

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  3. In a compound ,atoms of element Y from ccp lattice and those of elemen...

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  4. The density of a certain solid AB (formula mass =119) is 2.75 g//cm^(3...

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  5. Which defect cause decrease in the density of crystal?

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  6. A solid has a b.c.c. structure . If the distance of closest approach b...

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  7. KCl crystallises in the same type of lattice as does NaCl Given that r...

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  8. A compound alloy of gold and copper crystallizes in a cubic lattice in...

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  9. In which type of viods magnesium and silicon is present respectively i...

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  10. The composition of a sample of wustite is Fe(0.93)O(1.0). What is the ...

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  11. In a compound AB the ionic radii of A^(+) and B^(-) are 88 pm and 200 ...

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  12. In a solid AB having the NaCl structure, A atom occupies the corners o...

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  13. A compound formed by elements A and B crystallizes in cubic structure,...

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  14. Potassium has a bcc structure with nearest neighbour distance 4.52over...

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  15. A compound formed by elements A and B has a cubic structure in which A...

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  16. CsBr has BCC structure. The length of its side is 4.3 Å. The minimum d...

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  17. The edge length of a face centred unit cubic cell is 508 pm. If the ra...

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  18. The no. of atoms in 100g of a fcc crystal with density =10.0 g/cc ...

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  19. The unit cell of aluminium is a cube with an edge length of 405 pm. Th...

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  20. The face centred cell of nickel has an edge length 352.39 pm. The dens...

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