A solid compound contains X, Y and Z atoms in a cubic lattice with X atoms occupying the corners, Y atoms in the body centred position and Z atoms at the centres of faces of the unit cell. What is the empirical formula of the compound?
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The fraction of total volume occupied by the atoms present in a simple cube is |
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Percentage of free space in cubic close packed structure and in body centred packed structure are respectively |
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The efficiency of packing is 68% in |
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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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