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On elctrolysis of dil sulphuric acid usi...

On elctrolysis of dil sulphuric acid using Platinum (Pt) electrode the product obtained at anode will be:

A

Hydrogen gas

B

Oxygen gas

C

`H_(2)S` gas

D

`SO_(2)` gas

Text Solution

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The correct Answer is:
B
During the electrolysis of dil. sulphuric acid using Pt electrodes following reaction will take place. At cathode `4H^(+)(aq) + 4e^(-) rarr 2H_(2)(g)`
At anode: `2H_(2)O(l) rarr O_(2)(g) + 4H^(+) (aq) + 4e^(-)`
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On electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained at the anode will be

Electrolysis is the process in which electrical energy is converted to chemical energy. In electrolytic cell, oxidation takes place at anode and reduction at cathode. Electrode process depends on the electrode taken for electrolysis. Amount of substance liberated at an electrode is directly propertional to the amount of charge passed through it. The mass of substance liberated at electrode is calculated using the following relation : m= ("ItE")/(96500) Here, E represents the equivalent mass and 96500 C is called the Faraday constant. Faraday (96500 C) is the charge of 1 mole electron, i.e., 6.023 xx 10^(23) electrons, it is used to liberate one gram equivalent of the substance. On electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained at the anode will be :

In electrolysis of very dilute of NaOH using platinum electrodes

In electrolysis of dilute H_2SO_4 using platinum electrodes .

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