You visited us 13 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard X

Chemistry

Application of Electrolysis

On electrolyz...

Question

On electrolyzing a solution of dilute $H_{2} S O_{4}$ between platinum electrodes, the gas evolved at the anode and cathode respectively are :

S O_{2}

and

O_{2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

S O_{3}

and

H_{2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

O_{2}

and

H_{2}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

H_{2}

and

O_{2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $O_{2}$ and $H_{2}$
When $H_{2} S O_{4}$ is electrolysed, there are two different anion presents in solution $O H^{-}, S O_{4}^{2 -}$ .
But as oxidation potential of hydroxide ion is higher so it will oxidise first.

Reaction:
$2 H^{+} + 2 e \to H_{2}$ (Cathode)
$2 O H^{-} \to H_{2} O + (1 / 2) O_{2} + 2 e$ (Anode)

Suggest Corrections

Similar questions

When the aqueous solution of $L i_{2} S O_{4}$ electrolyzed the products formed at cathode and anode respectively are

Q. A dilute aqueous solution of

N a_{2} S O_{4}

is electrolysed using platinum electrodes. The product at anode and cathode, respectively are:

Q. A dilute aqueous solution of

C u S O_{4}

is electrolyzed using platinum electrodes. The products at the anode and cathode are:

Q. In a fuel cell,

H_{2}

and

O_{2}

react to produce electricity. In the process,

H_{2}

gas is oxidized at the anode and

O_{2}

gas is reduced at the cathode. If

67.2 litres

H_{2}

S T P

react in 15 minutes and the entire current is used for electrode deposition of

C u

from

C u (I I)

solution, how many grams of

C u

will be deposited and what is the average current produced?
Anode :

H_{2} + 2 O H^{-} \to 2 H_{2} O + 2 e^{-}

Cathode :

O_{2} + 2 H_{2} O + 4 e^{-} \to 4 O H^{-}

Q. In a fuel cell,

H_{2}

and

O_{2}

react to produce electricity. In the process,

H_{2}

gas is oxidized at the anode and

O_{2}

gas is reduced at the cathode. If

67.2 litres

H_{2}

S T P

react in 15 minutes and the entire current is used for electrode deposition of

C u

from

C u (I I)

solution, how many grams of

C u

will be deposited and what is the average current produced?
Anode :

H_{2} + 2 O H^{-} \to 2 H_{2} O + 2 e^{-}

Cathode :

O_{2} + 2 H_{2} O + 4 e^{-} \to 4 O H^{-}

Join BYJU'S Learning Program

On electrolyzing a solution of dilute H2SO4 between platinum electrodes, the gas evolved at the anode and cathode respectively are :

The correct option is C O2 and H2When H2SO4 is electrolysed, there are two different anion presents in solution OH−,SO2−4.But as oxidation potential of hydroxide ion is higher so it will oxidise first.Reaction:2H++2e→H2 (Cathode)2OH−→H2O+(1/2)O2+2e (Anode)

On electrolyzing a solution of dilute $H_{2} S O_{4}$ between platinum electrodes, the gas evolved at the anode and cathode respectively are :