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Which substance is a liquid under normal conditions?

Answer and explanation

Correct answer: Water

The governing concept is the physical state of a substance at ordinary temperature and pressure. Under normal classroom conditions, water exists as a liquid: it has a definite volume but takes the shape of its container and can flow. Therefore, option C is correct. Helium in a normal environment is a gas, so option A is not suitable. Glass is a solid, even though it can be shaped when heated strongly, and an iron nail is also a solid; these are the substances in options B and D. The word “normal” means that the usual ambient conditions are intended, not extreme pressure or temperature. State is identified here by observable properties such as flow and shape.

Related tags

ChemistryNature-Of-MatterClass-11Nature Of MatterSome Basic Concepts Of ChemistryClass 11 Mcq

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