Solid Types

The number of atoms per unit cell in simple, fcc and bcc unit cells are

• 1, 4, 2

• 1, 2, 4

• 2, 1, 4

• 2, 4, 1

What type of material is this one?

• Crystal

• Amorphous

• Covalent Crystal

• Ionic Crystal

Which of the following is not a characteristic of a crystalline solid?

• Definite and characteristic heat of fusion.

• Long range order or perfect arrangement of constituent particles

• Isotropic in nature

• clean cleavage or smooth edges on cutting with a knife

Which of the following is an amorphous solid?

• Copper(Cu)

• Quartz glass (SiO₂)

• Silicon carbide (SiC)

• Sodium Chloride (NaCl)

Which of the following is a network solid or covalent crystalline solid?

• Diamond (C)

• H₂O (Ice)

• Calcium Fluoride (CaF₂)

• Iron Metal (Fe)

The type of crystalline solid which is a good conductor in solid as well as molten state?

• Ionic Solid

• Metallic Solid

• Covalent Solid

• Molecular Solid

The crystal structure of sodium chloride is

• BCC
• FCC
• amorphous
• covalent

A. Ionic solids are hard and brittle.

B. Covalent solids are good conductors.

• A and B are correct.

• A is correct

• B is correct

• Both A and B are wrong

Which of the following is a network solid?

• SO₂(Solid)

• I₂(Solid)

• Diamond

• H₂O(Ice)

Crystal system characterized by a ≠ b≠ c and α = β = γ = 90^o

• Hexagonal

• Ortho rhombic

• Tetragonal

• Triclinic