Question

are all substances pure? Comment by giving 3 points in support of your answer.​

Answer 1

Answer:

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Explanation:

An element is a pure substance as it cannot be broken down or transformed into a new substance even by using some physical or chemical means. Elements are mostly metals, non-metals or metalloids. Compounds, on the other hand, are also pure substances when two or more elements are combined chemically in a fixed ratio.

Answer 2

Pure substances:-

• It is a Homogeneous material consisting of a single type of particles with definite set of properties.
• All substances are pure.

Pure substances:-

1. Elements
2. Compounds

Elements - Cannot be broken down into simpler substances.

eg copper, oxygen , iron etc

Compounds - have fixed composition. can be broken down into Elements by chemical or electromechanical reactions.

eg - water , methane , sugar , salt.

Hope it helps you