What always happens in a chemical change?Question response areaSelect one optionA gas is made.There is an explosion.New materials form.Oxygen is used up.
Question
What always happens in a chemical change?
Question response area
Select one option
- A gas is made.
- There is an explosion.
- New materials form.
- Oxygen is used up.
Solution
Answer Analysis
When a chemical change occurs, it fundamentally alters the composition and properties of the substances involved. The core characteristic of a chemical change is the formation of new substances as reactants interact and transform into products.
- Gas Production: While some chemical changes do produce gas (like combustion), not all do.
- Explosion: Explosions are specific types of reactions (like rapid combustion) and do not define all chemical changes.
- New Materials Form: This is a key outcome of a chemical change. The reactants are transformed into different substances with new chemical properties.
- Oxygen Use: Some reactions do consume oxygen, but this is also not true for all chemical changes.
Final Answer
The most accurate choice is: New materials form.
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