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Questions and Answers
What is a common example of a physical change?
What is a common example of a physical change?
- Rusting of iron
- Cooking an egg
- Melting of ice (correct)
- Burning of wood
Which of the following is a characteristic of a chemical change?
Which of the following is a characteristic of a chemical change?
- Change in state
- Change in shape
- Change in size
- Formation of a new substance (correct)
Which property is characteristic of molecular compounds?
Which property is characteristic of molecular compounds?
- Conduct electricity in the solid state
- Consist of discrete molecules (correct)
- High melting and boiling points
- Form lattices in the solid state
Which of the following is an indicator of a chemical change?
Which of the following is an indicator of a chemical change?
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What is a common property of molecular compounds?
What is a common property of molecular compounds?
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Which statement is true about the properties of molecular compounds?
Which statement is true about the properties of molecular compounds?
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Study Notes
Physical and Chemical Changes
- A common example of a physical change is melting or freezing of water, where the state changes but the chemical composition remains the same.
Characteristics of Chemical Changes
- A characteristic of a chemical change is the formation of a new substance, often accompanied by a change in color, odor, or production of heat/light.
Molecular Compounds
- Molecular compounds are characterized by being composed of molecules, where the atoms are chemically bonded together.
- A common property of molecular compounds is that they are typically soft and have low melting and boiling points.
- Molecular compounds are often brittle and exhibit poor electrical conductivity.
- The statement "Molecular compounds are typically composed of only two elements" is true about the properties of molecular compounds.
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Description
Test your knowledge of physical and chemical changes with this evaluation quiz. Answer questions about the characteristics and indicators of each type of change, and identify common examples of physical and chemical changes.
