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Questions and Answers
What is the process by which substances are transformed into different substances?
What is the process by which substances are transformed into different substances?
- Condensation
- Sublimation
- Evaporation
- Chemical reaction (correct)
What is the change in composition and properties of substances during a chemical reaction called?
What is the change in composition and properties of substances during a chemical reaction called?
- Atomic change
- Phase change
- Chemical change (correct)
- Physical change
Which of the following is NOT a requirement for a chemical reaction to occur?
Which of the following is NOT a requirement for a chemical reaction to occur?
- Sufficient activation energy
- Presence of catalyst
- Collision between particles
- Absence of oxygen (correct)
What term is used to describe the starting materials in a chemical reaction?
What term is used to describe the starting materials in a chemical reaction?
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