Question

Solid objects that are large enough to see and handle made of a large number of single crystals are called as ___________.

• A. crystal
• B. polycrystalline
• C. amorphous solid
• D. dry solid

Answer 1

Answer: (B)

polycrystalline

Solid objects that are large enough to see and handle are rarely composed of a single crystal, but instead are made of a large number of single crystals, known as crystallites, whose size can vary from a few nanometers to several meters. Such materials are called poly-crystalline. Almost all common metals, and many ceramics, are poly-crystalline.