You are given a substance. How would you experimentally determine if it is a solid, liquid, or gas at room temperature? List at least three observations you would make.
BiologyClass 9CBSEAnswered 12 May 2026
Answer
To determine if a substance is a solid, liquid, or gas at room temperature, I would make the following observations:
- Shape and Volume: Observe if it has a definite shape and a definite volume (solid), a definite volume but takes the shape of the container (liquid), or neither a definite shape nor volume (gas).
- Compressibility: Try to compress it. If it's highly compressible, it's likely a gas. If it's almost incompressible, it's a solid or liquid.
- Flow/Rigidity: Observe if it flows easily (liquid/gas) or is rigid and does not flow (solid). For example, try to pour it. Solids won't pour, liquids will, and gases will disperse.
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