#### Integer Type Questions Based On Chapter Solid State

The answer to each of the following question is a ** single digit-integer** ranging from 0 to 9. Fill in the correct digit.

**Q.1. **Silver (atomic weight = 108 g mol^{-l}) has a density of 10.5 g cm^{3}. The number of silver atoms on a surface of area 10^{-12} m² can be expressed in scientific notation as y x 10^{x}. The value of x is __________.

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Answer: 7**Q.2. **In NaCl structure, Cl ions have ccp arrangement and Nations occupy all the octahedral sites. The total number of Nat and Cl ions per unit cell is ___________

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Answer: 8**Q.3.** A metal ‘X’ crytallizes in a unit cell in which the radius of atom (r) is related to edge of unit cell(a) as r = 0.3535 a. The total number of atoms present per unit cell is ____________

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Answer: 4**Q.4. **The radius ratio of an ionic solid r. r_ is 0.524. The coordination number of this type of structure is ___________

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Answer: 6**Q.5.** Atoms of element N form hep arrangement and those of element M occupy 2/3rd of tetrahedral voids. The total number of M and N per formula unit is ____________

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Answer: 7**Q.6.** In hexagonal close packing, the difference in the number of tetrahedral and octahedral voids per unit cell is ___________

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Answer: 6**Q.7.** The ratio of coordination number of each sphere in ccp and hcp in three dimensions is ___________

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Answer: 1**Q.8. **A compound is formed by two elements X and Y. The element Y form ccp and atoms of X occupy 1/3 of tetrahedral voids. If the formula of the compound is X_{a} and Y_{b}, then value of a + b is ____________

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Answer: 5**Q.9. **A cubic unit cell has one atom on each corner and one atom on each body diagonal. The number of atoms in the unit cell is ____________

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Answer: 5**Q.10.** The number of hexagonal faces that are present in a truncated octahedron is ____________

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