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The addition of a crystal to a crystal
(a)lowers the density of the crystal.
(b)raises the density of the crystal.
(c)does not affect the density of the crystal.
(d)increases the Frenkel defects of the crystal.

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Important Questions on Solid State
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Which of the following is the incorrect statement?

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and have the same crystal structure and nearly the same ionic radii. If is the lattice energy of , the lattice energy of is nearly

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If germanium crystallises in the same way as diamond, which of the following statements is not correct?

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Sodium metal crystallises in BCC lattice with cell edge, What is the radius of the sodium atom?

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A metallic element crystallises into a lattice containing a sequence of layers of. Any packing of spheres leaves out voids in the lattice. What percentage by volume of this space is empty space?

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Which of the following statements is wrong?

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In a solid , having the structure, atoms occupy the corners of the cubic unit cell. If all the face-centred atoms along one of the axes are removed, the resultant stoichiometry of the solid is

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Argon crystallizes in a structure in which the atoms are located at the positions and . The unit cell is
