Question

Which among the following can be categorized as a crystalline solid?

• A. Glass
• B. Carbon black
• C. Resin
• D. Silver

Answer 1

The correct option is D Silver

Classification of solids based on arrangement of particles:
(i) Crystalline
(ii) Amorphous

Crystalline solids are solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

Characteristics of crystalline solids:
1. They have flat surfaces that meet at angles that are characteristic of the substance.
2. Arrangement of constituent particles (atoms, molecules or ions) in a crystal is ordered and repetitive
3. They are produced by slow cooling under controlled condition of liquid.
4. They shows isomorphism and polymorphism
5. These are anisotropic, which can shows variation of physical properties with directions.
6. They have definite characteristic geometrical shape and are called true solids.
7. They show long-range order in the arrangements and posses sharp melting point. They can also be cut along specific crystal planes

$Ag,Fe,Cu,NaCl,CuS{O}_4,NiS{O}_4,H_{2}O\left(s\right),$ Diamond, Graphite, Quartz, Sucrose (Sugar) are few examples of crystalline solids.

$\Rightarrow$ Glass, carbon black and resins are examples of amorphous solids.
Amorphous solids does not have a definite geometrical shape.

Thus, option (d) is correct.