The efficiency of packing is 68% in
hcp structure
ccp structure
fcc structure
bcc structure
Additional Questions
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A substance AxBy crystallizes in a face centred cubic (fcc) lattice in which atoms 'a' occupy each corner of the cube and atoms ‘B’ occupy the centres of each face of the cube. Identify the correct composition of the substance AxBy: |
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Which one of the following compound exhibits both Schottky and Frenkel defects? |
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AB is an ionic solid. If the ratio of ionic radii of A+and B– is 0.52. What is the coordination number of B–? |
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For a crystal, the angle of diffraction (2θ) is 90° and the second order line has a d value of 2.28Å. The wavelength (in Å) of X–rays usedfor Bragg's diffraction is |
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Lithium has a bcc structure. Its density is 530 kg m–3 and its atomic mass is 6.94 g mol–1. Calculate the edge length of a unit cell of Lithium metal (NA = 6.02 × 1023 mol–1) |
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If AgI crystallizes in zinc blende structure with I– ions at lattice points, what fraction of tetrahedral voids is occupied by Ag+ ions? |
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If the distance between Na+ and Cl– ions in sodium chloride crystal is X pm, the length of the edge of the unit cell is |
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If Z is the number of atoms in the unit cell that represents the closest packing sequence ABC ABC_____, the number of tetrahedral voids in the unit cell is equal to |
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In a face centredcubic (fcc) arrangement, the number of atoms per unit cell is |
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In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is |
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