Virtual Labs

Electrodeposition study using Amperometry technique.

Q1. Which of the following is a limitation of amperometry?

a: It requires a complex setup. Explanation

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b: Inapplicability to gaseous samples. Explanation

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c: Exclusive suitability for biological samples. Explanation

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d: Susceptibility to interference from other substances. Explanation

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Q2. Amperometry is particularly useful for studying _____________ reactions?

a: Acid-base. Explanation

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b: Precipitation. Explanation

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c: Organic synthesis. Explanation

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d: Redox. Explanation

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Q3. Why is electrodeposition commonly used in amperometry?

a: To deposit a substance for analysis. Explanation

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b: Voltage measurement. Explanation

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c: To increase resistance. Explanation

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d: To decrease the current density. Explanation

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Q4. Which characteristic of tungsten trioxide (WO3) semiconductor renders it suitable for application as an anode electrode in oxidation reactions?

a: Exceptional transparency and flexibility. Explanation

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b: High thermal conductivity and low electrical resistance. Explanation

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c: Superior chemical stability and electrical conductivity. Explanation

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d: None of the above. Explanation

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Q5. What is illustrated by the current-time graph in amperometry?

a: The applied potential throughout the experiment. Explanation

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b: The resistance changes in the experimental setup. Explanation

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c: The variations in temperature and pressure during the electrochemical reaction. Explanation

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d: The flow of current concerning time during the experiment. Explanation

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Q6. Which types of electrodes are commonly used in amperometry?

a: Anodes. Explanation

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b: Cathodes. Explanation

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c: Both of them. Explanation

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d: Neither of them. Explanation

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Q7. How does the deposition time impact the resulting current-time graph in amperometry?

a: Deposition time has no significant effect on the current-time graph. Explanation

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b: Longer deposition times lead to lower currents, suggesting decreased electrodeposition rates and thinner deposited layers. Explanation

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c: Longer deposition times generally lead to higher currents. Explanation

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d: Shorter deposition times result in higher currents due to rapid electrodeposition and enhanced material quality. Explanation

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Q8. Why is the amperometric method considered best for WO3 thin film fabrication compared to other electrodeposition methods?

a: It ensures rapid growth of WO3 films, reducing fabrication time without compromising film quality. Explanation

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b: WO3 thin films prepared by amperometry exhibit unique optical properties. Explanation

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c: It allows precise control of the deposition process, leading to uniform and well-defined WO3 thin films. Explanation

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d: Other methods cannot measure current during deposition, resulting in poor quality and inconsistent WO3 films. Explanation

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