Question

Gases do not have a definite shape but have a definite mass.

• A. True
• B. False

Answer 1

The correct option is A True

• The intermolecular forces in gases are very weak, almost negligible. Hence, they cannot hold the gas molecules together.
• The molecules of gas can thus move about freely in any direction. Thus gases cannot have a fixed shape.
• Mass of anything is the amount of matter contained in it. No matter the volume of the container the gas is kept in, a definite amount of gas will always have the same amount of gas molecules in it.
• So mass is always definite.

Hence, the given statement is true.