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Electro Chemistry (Advanced) - Practice Sheet Solution, Class 12, Chemistry - JEE PDF Download

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FAQs on Electro Chemistry (Advanced) - Practice Sheet Solution, Class 12, Chemistry - JEE

1. What is electrochemistry?
Ans. Electrochemistry is the branch of chemistry that deals with the study of chemical reactions involving the transfer of electrons between species. It involves the study of how electricity can be generated from chemical reactions (electrochemical cells) and how chemical reactions can be induced using electricity (electrolysis).
2. What are some applications of electrochemistry?
Ans. Electrochemistry has various applications in our daily lives and in industries. Some of the applications include: - Batteries: Electrochemical cells are used in batteries to store and provide electrical energy. - Corrosion: Electrochemical processes play a key role in the corrosion of metals. - Electroplating: Electrolysis is used for electroplating metals onto surfaces. - Fuel cells: Electrochemical cells are used in fuel cells to produce electricity by converting fuel and oxidant into electrical energy. - Sensors: Electrochemical sensors are used in various devices to detect and measure chemical species.
3. What is the significance of electrode potential in electrochemistry?
Ans. Electrode potential is a measure of the tendency of an electrode to gain or lose electrons during a redox reaction. It is an important parameter in electrochemistry as it determines the direction of electron flow and the overall cell potential. The difference in electrode potentials between two electrodes in an electrochemical cell determines the voltage or electrical potential difference of the cell.
4. How does electrolysis work in electrochemistry?
Ans. Electrolysis is a process that uses an electric current to drive a non-spontaneous chemical reaction. It involves the decomposition of an electrolyte (a compound that conducts electricity when dissolved or molten) into its constituent ions. The positive ions (cations) are attracted to the negative electrode (cathode) and gain electrons, while the negative ions (anions) are attracted to the positive electrode (anode) and lose electrons. This results in the formation of new substances at the electrodes.
5. What is Faraday's law of electrolysis?
Ans. Faraday's law of electrolysis states that the amount of a substance produced or consumed during electrolysis is directly proportional to the quantity of electricity passed through the electrolyte. The law can be expressed as: Mass of substance = (Current × Time) / (Faraday's constant × Number of electrons transferred) This law helps in calculating the amount of substance produced or consumed during electrolysis and is widely used in various electrochemical processes.
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