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What is the simple meaning of allotropy?

Answer and explanation

Correct answer: One element existing in two or more forms

The governing concept is allotropy. Allotropy is the ability of the same element to exist in two or more different structural forms, usually in the same physical state. These different forms are called allotropes. Their atoms may be arranged differently or joined by different bonding patterns, so their physical and sometimes chemical properties can differ greatly. Carbon illustrates this clearly: diamond has a rigid three-dimensional structure and is extremely hard, whereas graphite has layered sheets, is soft, and conducts electricity. Both substances contain only carbon atoms. Thus option B gives the correct simple meaning. Option A incorrectly says there is only one form, while options C and D describe mixing or a change of state, not a structural variation of one element.

Related tags

AllotropyCarbonDiamond And GraphiteForms Of ElementsNature Of MatterSome Basic Concepts Of ChemistryChemistryClass 11 Mcq

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