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In which state is rigidity most commonly observed?

Answer and explanation

Correct answer: Solid

The governing concept is the relationship between particle arrangement and the physical properties of matter. Rigidity means resistance to a change in shape. In a solid, particles are closely packed and held by comparatively strong attractive forces. They mainly vibrate about fixed mean positions, so the solid retains its own shape and resists deformation. Liquids have a definite volume but their particles can move past one another, allowing them to flow and take the shape of a container. Gases and vapours have particles far apart and possess neither a fixed shape nor a fixed volume. Therefore option A, solid, is correct. The remaining choices describe fluids, which do not normally show rigidity as a characteristic bulk property.

Related tags

States Of MatterRigidityParticle ArrangementNature Of MatterSome Basic Concepts Of ChemistryChemistryClass 11 Mcq

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