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Chemical Reactions Video Lecture | Chemistry for GCSE/IGCSE - Year 11

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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.
72 videos|113 docs|61 tests
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