Introduction to Physical and Chemical Change (Grade 10 NSC Matric Physical Sciences): Quizzes

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Introduction to Physical and Chemical Change
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What happens to particles during a physical change?

They rearrange but remain intact

When water evaporates from H2O (ℓ)\text{H}_2\text{O (ℓ)} to H2O (g)\text{H}_2\text{O (g)}, what changes?

Only the state symbol changes

Which property is NOT conserved during a physical change?

Energy form

Why are physical changes easier to reverse than chemical changes?

Methods like filtration can separate

What defines a chemical change?

New substances form in a reaction

What are the products when 2H2O2(aq)2\text{H}_2\text{O}_2\text{(aq)} decomposes?

2H2O (ℓ)+O2(g)2\text{H}_2\text{O (ℓ)} + \text{O}_2\text{(g)}

What property does iron sulphide (FeS\text{FeS}) NOT have?

Magnetic like iron

How do energy changes in chemical changes compare to physical changes?

Much greater in chemical changes

What is conserved in both physical and chemical changes?

Mass and number of atoms

Which best distinguishes chemical from physical changes?

Chemical changes form new substances

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