RRB Group D 27 Nov 2025 Shift 3 Solved Paper

Concept:Gases have no fixed shape and no fixed volume due to the loose arrangement of their molecules.Explanation:In gases, molecules are far apart and move freely in all directions.This allows gases to take both the shape and volume of their container.Gases are highly compressible because applying pressure reduces the space between molecules.They are also fluids, meaning their particles flow easily.Option A ($\text{No fixed shape and no fixed volume}$) is the correct description of gases.Option B ($\text{No fixed shape but fixed volume}$) is a property of liquids, not gases.Option C ($\text{Fixed shape and volume}$) is a property of solids.Option D ($\text{Compressible but not fluid}$) is incorrect because gases are both compressible and fluid.Answer:A: No fixed shape and no fixed volume