Year 11 Exam > Year 11 Videos > Chemistry for GCSE/IGCSE > Chemical Reactions
Chemical Reactions Video Lecture | Chemistry for GCSE/IGCSE - Year 11
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72 videos|113 docs|61 tests
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FAQs on Chemical Reactions Video Lecture - Chemistry for GCSE/IGCSE - Year 11
| 1. What is a chemical reaction? |  |
Ans. A chemical reaction is a process in which one or more substances (reactants) are converted into new substances (products) with different chemical properties.
| 2. What are the different types of chemical reactions? | |
Ans. The different types of chemical reactions include synthesis, decomposition, single displacement, double displacement, combustion, and redox reactions.
| 3. How can you identify if a chemical reaction has occurred? | |
Ans. Some indicators of a chemical reaction include color change, formation of a precipitate, evolution of gas, and change in temperature.
| 4. What is the role of catalysts in chemical reactions? | |
Ans. Catalysts are substances that increase the rate of a chemical reaction without being consumed in the process. They provide an alternative pathway with lower activation energy for the reaction to occur.
| 5. How do chemical reactions follow the principle of conservation of mass? | |
Ans. According to the principle of conservation of mass, the total mass of the reactants must equal the total mass of the products in a chemical reaction. This means that atoms are not created or destroyed during a chemical reaction, only rearranged.
About this Video
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Nov 22, 2024 Last updated |
Video Description: Chemical Reactions for Year 11 2024 is part of Chemistry for GCSE/IGCSE preparation.
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