MCQs on Solid State
- How many unit cells are divided equally in a face-centred cubic lattice?
- A crystalline solid:
- changes abruptly from solid to liquid when heated.
- has no definite melting point.
- undergoes deformation of its geometry easily
- has irregular 3-dimensional arrangements.
- In a simple cubic, body-centred cubic and face-centred cubic structure, the ratio of the number of atoms present is respectively
- Na and Mg crystallize in crystals of bcc and fcc form respectively and then the amount of Na and Mg atoms present in their respective crystal unit cells is:
- 4 and 2
- 9 and 14
- 14 and 9
- 2 and 4
- Ferrous oxide has a cubic structure and each unit cell edge is 5.0Ao. Assuming the oxide density is 4.0g / cm3, the amount of Fe2+ and O2- ions in each unit cell will then be
- four Fe2+ and four O2-
- two Fe2+ and four O2-
- four Fe2+ and two O2-
- three Fe2+ and three O2-
- Each of the following solids shows the Frenkel defect except
- Schottky defect in a crystal is observed when
- The ion leaves its normal position and occupies an interstitial location
- the unequal number of cation and anions are missing from the lattice
- the density of the crystal increases.
- an equal number of cations and anions are missing from the lattice.
- Copper crystalline in FCC with a unit cell length of 361pm. What is the radius of a copper atom?
- The total no of voids in 0.5 mol of a compound forming hexagonal close-packed structure are:
- 6.022 × 1023
- 3.011 × 1023
- 9.033 × 1023
- 4.516 × 1023
- For the orthorhombic system, axial ratios are a ≠ b ≠ c and the axial angles are:
- α = β = γ ≠ 90o
- α ≠ β ≠ γ ≠ 90o
- α = β = γ = 90o
- α ≠ β ≠ γ = 90o