Pertanyaan
Which is an example of a physical property? a)Reactivity with water b) Bolling point c) d) Tomishing=chorgngor (olor What is a key characteristic of a chemical change? a) Formation of a new substance (b)Change in state of matter c) Separation of mixtures d) Dissolution in a solvent Which property is considered a chemical property of a substance? a) Mass b) Volume c) Reactivity with oxygen d) Shape Which of the following is an indicator of a chemical change? a) Phase change from solid to liquid b) Change in mass c) Formation of bubbles or gas d) Dissolving of salt in water Which of these describes a physical property? a) Reaction with acid b) Flammability C)Hardness d) Corrosion Which of the following is not a chemical property? a) Reactivity with water b) Density c) Flammability d) Ability to corrode Which of these is an example of a chemical property? a) Color b) Melting point C)Reactivity with acid d) Electrical conductivity
Jawaban
1. Which is an example of a physical property?
* (b) Boiling point
* Explanation: Physical properties are characteristics that can be observed or measured without changing the substance's chemical composition. Boiling point is the temperature at which a substance changes from a liquid to a gas. This change is physical, not chemical.
2. What is a key characteristic of a chemical change?
* (a) Formation of a new substance
* Explanation: Chemical changes involve the formation of new substances with different chemical compositions. This is a key indicator of a chemical reaction.
3. Which property is considered a chemical property of a substance?
* (c) Reactivity with oxygen
* Explanation: Chemical properties describe how a substance reacts with other substances. Reactivity with oxygen refers to how readily a substance will combine with oxygen, which is a chemical reaction.
4. Which of the following is an indicator of a chemical change?
* (c) Formation of bubbles or gas
* Explanation: The formation of bubbles or gas often indicates the release of a gas during a chemical reaction, signifying a change in the substance's composition.
5. Which of these describes a physical property?
* (c) Hardness
* Explanation: Hardness is a measure of a substance's resistance to scratching or indentation. This is a physical property because it doesn't involve changing the substance's chemical makeup.
6. Which of the following is not a chemical property?
* (b) Density
* Explanation: Density is a physical property that describes the mass of a substance per unit volume. It doesn't involve chemical reactions or changes in composition.
7. Which of these is an example of a chemical property?
* (c) Reactivity with acid
* Explanation: Reactivity with acid describes how a substance reacts with an acid, which is a chemical reaction. This is a chemical property because it involves a change in the substance's composition.
Pertanyaan Panas
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