Quiz for Solid State

Q1: Which of the following is a characteristic of crystalline solids?

A. Definite melting point B. No fixed shape C. No regular arrangement of particles D. No long-range order

Q2: The packing efficiency of face-centered cubic (FCC) structure is:

A. 74% B. 52% C. 68% D. 34%

Q3: Which crystal system has all sides equal and all angles 90°?

A. Cubic B. Tetragonal C. Orthorhombic D. Monoclinic

Q4: The unit cell of sodium chloride is:

A. Face-centered cubic B. Body-centered cubic C. Simple cubic D. Hexagonal

Q5: Which type of crystal has the highest melting point?

A. Ionic crystals B. Molecular crystals C. Metallic crystals D. Covalent crystals

Q6: In a body-centered cubic (BCC) unit cell, the number of atoms per unit cell is:

A. 2 B. 1 C. 4 D. 3

Q7: The coordination number in a simple cubic lattice is:

A. 6 B. 8 C. 12 D. 4

Q8: The density of a crystalline solid depends on:

A. Unit cell dimensions and number of atoms B. Color C. Melting point D. Pressure

Q9: A solid with irregular arrangement of particles is called:

A. Amorphous B. Crystalline C. Ionic D. Metallic

Q10: The unit cell edge length of a cubic system is 4 Å. What is the volume?

A. 64 ų B. 16 ų C. 12 ų D. 8 ų

Q11: Which type of defect causes coloration in ionic solids?

A. F-centers B. Schottky defect C. Frenkel defect D. Vacancy

Q12: In Schottky defect, which particles are missing?

A. Equal number of cations and anions B. Only cations C. Only anions D. Electrons

Q13: The electrical conductivity of metals is due to:

A. Free electrons B. Ions C. Molecules D. Neutrons

Q14: The term "coordination number" refers to:

A. Number of nearest neighbors B. Number of electrons C. Number of atoms in unit cell D. Number of unit cells

Q15: The number of atoms in a face-centered cubic unit cell is:

A. 4 B. 1 C. 2 D. 3

Q16: Which solid has the highest density?

A. Tungsten B. Ice C. Quartz D. Diamond

Q17: The simplest unit of a crystal lattice is:

A. Unit cell B. Molecule C. Atom D. Ion

Q18: The void space in a close packed structure is approximately:

A. 26% B. 50% C. 10% D. 5%

Q19: In Frenkel defect, which particles are displaced?

A. Cations from lattice to interstitial sites B. Anions missing C. Both cations and anions missing D. Electrons missing

Q20: Which of the following is NOT a crystalline solid?

A. Glass B. Salt C. Diamond D. Quartz