Question

An increase in the surface area of a solid is called

• A. linear expansion
• B. cubical expansion
• C. superficial expansion

Answer 1

The correct option is C

superficial expansion

The explanation for the correct answer:

1. Superficial expansion: change in the area of a solid upon heating is called superficial expansion.

The explanation for the incorrect answer:

1. Linear expansion: when a metal rod is heated change in length takes place.
2. Cubical expansion: When a solid is heated its volume change. This change in volume is called cubical expansion.

Hence option C is the correct answer.