Question

Assertion (A) : A pure substance is homogenous in nature

Reasons (R): The composition of a pure substance cannot be altered by physical ( ans in assertion and reason)
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Answer 1

Answer:

Pure substances are mostly homogeneous in nature containing only one type of atoms or molecules. These substances mainly have a constant or uniform composition throughout. The substances have fixed boiling and melting points. A pure substance usually participates in a chemical reaction to form predictable products.