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Fundamental Concepts of Chemistry Physical and Chemical Changes

1

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Which of the following are chemical processes? (1) Rusting of a nail (2) Freezing of water (3) Decomposition of water into H₂ and O₂ (4) Compression of O₂ gas

Verified Answer & Explanation⌄

Correct Answer: C) 1 and 3

Concept Explanation

Rusting and decomposition form new substances. Freezing and compression are physical changes.

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