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What is a compound?

Answer and explanation

Correct answer: Chemical combination of two or more elements in a fixed ratio

A compound is a pure substance formed when atoms of two or more different elements combine chemically in a definite proportion by mass. Chemical combination produces a new substance with properties different from those of its constituent elements; for example, sodium chloride has properties unlike sodium and chlorine. A compound can be represented by a fixed chemical formula, such as H2O or CO2, and it cannot be separated into its elements by ordinary physical methods. Option C is therefore correct. Option A describes only part of an element, while B and D do not give a scientific definition of a compound.

Related tags

CompoundFixed RatioChemical CombinationNature Of MatterSome Basic Concepts Of ChemistryChemistryClass 11 Mcq

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