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Types of Chemical Reactions Video Lecture - Class 10
FAQs on Types of Chemical Reactions Video Lecture - Class 10
| 1. What are the different types of chemical reactions? |  |
Ans. The different types of chemical reactions are:
1. Combination or Synthesis Reactions: In these reactions, two or more substances combine to form a new compound.
2. Decomposition Reactions: These reactions involve the breakdown of a compound into simpler substances.
3. Displacement or Replacement Reactions: In these reactions, one element replaces or displaces another element in a compound.
4. Double Displacement or Metathesis Reactions: These reactions involve the exchange of ions between two compounds.
5. Combustion Reactions: Combustion reactions occur when a substance reacts with oxygen, releasing heat and light.
| 2. What is a combination or synthesis reaction? | |
Ans. A combination or synthesis reaction is a type of chemical reaction where two or more substances combine to form a new compound. The reactants in a synthesis reaction can be elements or compounds, and the product is always a compound. The general equation for a combination reaction is A + B → AB, where A and B are the reactants, and AB is the product. For example, the reaction between hydrogen gas (H2) and oxygen gas (O2) to form water (H2O) is a synthesis reaction.
| 3. How do decomposition reactions occur? | |
Ans. Decomposition reactions occur when a compound breaks down into simpler substances. This can happen due to the application of heat, exposure to light, or the addition of a catalyst. Decomposition reactions can be represented by the general equation AB → A + B, where AB is the reactant compound and A and B are the products. For example, the decomposition of hydrogen peroxide (H2O2) into water (H2O) and oxygen gas (O2) is a decomposition reaction.
| 4. What is a displacement or replacement reaction? | |
Ans. A displacement or replacement reaction is a type of chemical reaction where one element replaces or displaces another element in a compound. These reactions typically occur between a metal and a compound containing another metal or a non-metal. The general equation for a displacement reaction is A + BC → AC + B or A + BC → BA + C, where A and B are elements and BC is the compound. For example, the reaction between zinc (Zn) and hydrochloric acid (HCl) to form zinc chloride (ZnCl2) and hydrogen gas (H2) is a displacement reaction.
| 5. How do combustion reactions occur? | |
Ans. Combustion reactions occur when a substance reacts with oxygen, usually from the air, to produce heat and light. The reactant in a combustion reaction is often a hydrocarbon (a compound made up of hydrogen and carbon), and the products are carbon dioxide (CO2) and water (H2O). The general equation for a combustion reaction is fuel + oxygen → carbon dioxide + water + heat. For example, the combustion of methane (CH4) in the presence of oxygen produces carbon dioxide and water, along with releasing heat and light.
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Nov 22, 2024 Last updated |
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