Which statement describes a physical change?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Study for the Grade 9 Environmental Chemistry Test. Use a blend of multiple-choice questions and detailed explanations. Master key concepts and prepare effectively!

Multiple Choice

Which statement describes a physical change?

Explanation:
Physical changes involve a change in form or phase without making a new substance. Dissolving salt in water fits this because the salt disperses and becomes ions in solution, but it remains the same chemical species and the process is reversible by evaporating the water, so no new substance is formed. In contrast, rusting iron, burning wood, and cooking an egg all involve chemical changes where new substances with different properties are produced (iron oxide, ash and gases, denatured and coagulated proteins), which are not simply reversible through physical means.

Physical changes involve a change in form or phase without making a new substance. Dissolving salt in water fits this because the salt disperses and becomes ions in solution, but it remains the same chemical species and the process is reversible by evaporating the water, so no new substance is formed. In contrast, rusting iron, burning wood, and cooking an egg all involve chemical changes where new substances with different properties are produced (iron oxide, ash and gases, denatured and coagulated proteins), which are not simply reversible through physical means.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy