Statement I: Identification of cathode and anode is done by the use of a thermometer
Statement II: Higher is the value of reduction potential lesser would be its reduction power
Answer & explanation
Correct answer: option 4
The correct answer is option 4. Both Statement I and Statement II are incorrect.
Statement I: The identification of the cathode and anode in an electrochemical cell is typically done using a voltmeter, not a thermometer. A voltmeter measures the potential difference between the electrodes, indicating which electrode is the cathode (positive) and which is the anode (negative).
Statement II: The statement "Higher is the value of reduction potential lesser would be its reduction power" is incorrect. The reduction potential of a half-reaction is a measure of its tendency to undergo reduction. A higher reduction potential indicates a greater tendency to undergo reduction, meaning the substance has a stronger reducing power.
Therefore, Statement I is incorrect, as a voltmeter is indeed used to identify the cathode and anode, but Statement II is false, as the relationship between reduction potential and reduction power is inverse, not direct.