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Standard XII

Chemistry

Introduction

The electroly...

Question

The electrolysis of aqueous solution of $C u {B r}_{2}$ using platinum electrode would leads to:

C u

at anode

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{B r}_{2}

gas at anode and

O_{2}

gas at cathode

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C u

at cathode

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H_{2}

gas at cathode

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Solution

The correct option is C $C u$ at cathode
'Copper $(C u)$ at the cathode' is the answer.

Detailed explanation:

Below is the chemical reaction behind the electrolysis of aqueous solution of $C u B r_{2}$ ( Copper Bromide) with use of Platinum electrodes (inert).

$C u B r_{2} ⟶ C u + 2 {B r}^{-}$

Reaction that happens at Anode:

$2 {B r}^{-} ⟶ {B r}_{2} + 2 e^{-}$

Reaction that happens at Cathode:

$C u + 2 e^{-} ⟶ C u$

Option C is the correct answer.

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Similar questions

Q. During electrolysis of aqueous

N a O H, 4 g

O_{2}

gas is liberated at NTP at anode,

H_{2}

gas liberated at cathode is:-

Aqueous $C u S O_{4}$ is electrolyzed using $A g$ as anode and $C u$ as cathode, then product of electrolysis at anode and cathode are, respectively

Which of the following statements are correct?

a) The electrolysis of aqueous NaCl produces hydrogen gas at the cathode and chlorine gas at the anode .

b) The electrolysis of a $C u S O_{4}$ solution using Pt electrodes causes the liberation of $O_{2}$ at the anode and the deposition of copper at the cathode .

c) Oxygen and hydrogen are produced at the anode and cathode during the electrolysis of dilute aqueous solution of $H_{2} S O_{4}$ .

d) All electrolytic reactions are redox reactions .

Q. Assertion: Starting from aq. copper [II] sulphate solution, equations for the reactions at the cathode and anode during electrolysis of aq.

C u S O_{4}

using active copper electrodes is;
at anode:

C u^{+ 2} + 2 e^{-} \to C u

at cathode:

C u \to C u^{+ 2} + 2 e^{-}

Reason: Oxidation always take place at anode and reduction at cathode.

Q. During electrolysis of an aqueous solution of

C u S O_{4}

using copper electrodes, if 2.5 g of Cu is deposited at cathode, then at anode:

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The electrolysis of aqueous solution of CuBr2 using platinum electrode would leads to:

The electrolysis of aqueous solution of $C u {B r}_{2}$ using platinum electrode would leads to: