Question

Which of the following substances are fluids?

• A. Brick
• B. Wood
• C. Oil
• D. Chalk

Answer 1

The correct option is C Oil

Any substance that can flow is called fluid. All gaseous materials and liquid materials are considered fluids. Gases and liquids do not have a definite shape and have a weak force of attraction between their particles, hence, they can flow easily.
Oxygen exists in the gaseous state and oil exists in the liquid state, hence, they are fluids. Brick, wood and chalk are in solid-state. Thus, they are not fluids.