Question

Match the following substances with their respective states of existence at room temperature.

• A. Liquid
• B. Solid
• C. Gas

Answer 1

• Pen is a solid as it is rigid and has definite shape and volume. It cannot be compressed with hands.
• Ink is a liquid at room temperature. It has indefinite shape but definite volume. It can flow and take the shape of the container in which it is kept. It is incompressible.
• Oxygen is a gas at room temperature. It has indefinite shape and volume. It can flow and take the shape of the container in which it is kept. Also, it is highly compressible.