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FAQs on Redox Reaction (Advanced) - Practice Sheet Solution, Class 11, Chemistry - JEE
| 1. What is a redox reaction? |  |
Ans. A redox reaction, also known as a reduction-oxidation reaction, is a chemical reaction that involves the transfer of electrons between two species. One species undergoes oxidation, where it loses electrons, while the other undergoes reduction, where it gains electrons. This transfer of electrons is essential for the reaction to occur.
| 2. How can you identify if a reaction is a redox reaction? | |
Ans. To identify if a reaction is a redox reaction, you can follow these steps:
1. Assign oxidation numbers to each element in the reaction.
2. Check for any changes in oxidation numbers from reactants to products.
3. If there are changes in oxidation numbers, it indicates the presence of a redox reaction.
4. The element that undergoes an increase in oxidation number is oxidized, while the one that undergoes a decrease is reduced.
| 3. What is the significance of redox reactions in everyday life? | |
Ans. Redox reactions play a crucial role in everyday life. Some significant examples include:
1. Cellular respiration: Redox reactions occur during the process of cellular respiration, where glucose is oxidized to produce energy in the form of ATP.
2. Corrosion: The rusting of iron is a redox reaction, where iron is oxidized to form iron oxide due to the presence of oxygen and water.
3. Photosynthesis: In photosynthesis, plants convert carbon dioxide into glucose, which involves a series of redox reactions.
4. Batteries: The functioning of batteries is based on redox reactions, where electrons are transferred between electrodes to generate electrical energy.
| 4. Can you give an example of a redox reaction? | |
Ans. One example of a redox reaction is the reaction between magnesium (Mg) and oxygen (O2) to form magnesium oxide (MgO). In this reaction, magnesium is oxidized, and oxygen is reduced. The balanced equation for this reaction is:
2 Mg + O2 -> 2 MgO
| 5. How are redox reactions important in the field of chemistry? | |
Ans. Redox reactions have significant importance in the field of chemistry. Some key points include:
1. Balancing equations: Redox reactions require balancing of chemical equations, which is an essential skill in chemistry.
2. Understanding oxidation states: Redox reactions help in understanding and determining the oxidation states of elements in compounds, which is crucial for various chemical calculations.
3. Electrochemistry: Redox reactions form the basis of electrochemistry, which involves the study of chemical reactions involving the transfer of electrons and the generation of electrical energy.
4. Redox titrations: Redox reactions are commonly used in analytical chemistry for titrations, where the concentration of a substance is determined by its reaction with a known oxidizing or reducing agent.
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