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  • Which of the following is false about electrolysis of water ? Option: 1 Platinum electrodes can be used <div class='qna-optio

Which of the following is false about electrolysis of water ? 

Option: 1

Platinum electrodes can be used 


Option: 2

Hydrogen is released at cathode


Option: 3

Pure water is used for electrolysis 


Option: 4

Oxygen is produced at anode


Answers (1)

best_answer

As we have learnt in electrolysis of water,

2H_2O \longrightarrow 2H_2 + O_2

Reactions occuring at cathode and anode are given as 

Cathode: 2H_2O + 2e^- \longrightarrow H_2 + 2OH^-Anode: 2H_2O \longrightarrow 4H^+ + O_2 + 4e^-

Thus, H_2 and O_2 are produced respectively at Cathode and Anode

Pure water is a poor conductor of electricity, so some acid or alkali is added to it.

Therefore, option(3)is correct.

Posted by

SANGALDEEP SINGH

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