Electro Reducible substances can be determined by

Question

Question

This question was previously asked in

RRB Pharmacist Exam Paper 2019

Answer 1

Correct Answer: Amperometry

Explanation:

Amperometry: This is an electrochemical technique that measures the current resulting from the reduction (or oxidation) of an analyte at an electrode as a function of an applied potential. It is directly related to the number of electrons involved in the redox process, making it ideal for determining electro reducible substances, where the current response is proportional to the concentration of the reducible species.

Explanation of Other Options:

Potentiometry

Potentiometry measures the electrical potential of a solution to determine the concentration of ions. It is commonly used with pH meters or ion-selective electrodes but is not typically used to measure the current associated with the reduction of substances, which is necessary for the detection of electro reducible substances.

Calorimetry

Calorimetry measures the heat of chemical reactions or physical changes. It does not relate to electrochemical properties and is not used for measuring electro reducible substances.

Conductometry

Conductometry measures the electrical conductivity of a solution, which changes as ions are converted to neutral species. While it can provide information about ionic strength and concentration, it does not specifically measure the current resulting from the reduction or oxidation of a substance.

Additional Information:

Electrochemistry Applications: Amperometry is widely used in electrochemical sensors, such as glucose meters, and in analytical chemistry for trace analysis of reducible compounds.
Techniques: Amperometric sensors work by applying a constant potential to an electrode and measuring the resulting current, which is directly proportional to the concentration of the electroactive species being reduced or oxidized.

Conclusion:

Electro reducible substances can be determined by amperometry because it directly measures the current associated with the reduction of these substances, providing information about their concentration and electrochemical behavior.