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Byju's Answer

Standard XII

Chemistry

Secondary Cells

For a car bat...

Question

For a car battery, which one is a correct statement?

Cathode is lead dioxide

(P b O_{2})

and anode is copper

(C u)

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Cathode is copper

(C u)

and anode is lead dioxide

(P b O_{2})

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Cathode is copper

(C u)

and anode is lead

(P b)

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Cathode is lead dioxide

(P b O_{2})

and anode is lead

(P b)

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Solution

The correct option is D Cathode is lead dioxide $(P b O_{2})$ and anode is lead $(P b)$
Car battery is a lead storage battery. In which cathode is made of $P b O_{2}$ and anode is made of $P b - p l a t e s$ .

$P b O_{2} (P b^{4 +})$ reduce to $P b^{2 +}$ at cathode, while $P b$ oxidise to $P b^{2 +}$ at anode.

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Similar questions

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. Lead storage battery has anode and cathode respectively made up of:

(a) Here is an electrode reaction :

$C u \to C u^{2 +} + 2 e^{-}$ . At which electrode (anode or cathode) would such a reaction take place? Is this an example of oxidation or reduction ?

(b) A solution contains magnesium ions $(M g^{2 +})$ , iron (II) ions $F e^{2 +}$ and copper ions $C u^{2 +}$ . On passing an electric current through this solution, which ions will be the first to be discharged at the cathode? Write the equation for the cathode reaction.

(d) During the electrolysis of molten lead bromide, which of the following takes place ?

A. Bromine is released at the cathode,

B. Lead is deposited at the anode,

C. Bromine ions gain electrons,

D. Lead is deposited at the cathode.

Q. Select the correct answer from the list given in brackets:
The ion which is discharged at the anode during the electrolysis of copper sulphate solutions using copper electrodes as anode and cathode.

[C u^{2 +}, O H^{-}, S O_{4}^{2 -}, H^{+}]

Q. Choose the correct answer:
During the electrolysis of molten lead bromide, which of the following takes place?
(a) Bromine is released at the cathode
(b) Lead is deposited at the anode
(c) Bromine ions gain electrons
(d) Lead is deposited at the cathode

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For a car battery, which one is a correct statement?

The correct option is D Cathode is lead dioxide (PbO2) and anode is lead (Pb)Car battery is a lead storage battery. In which cathode is made of PbO2 and anode is made of Pb−plates. PbO2(Pb4+) reduce to Pb2+ at cathode, while Pb oxidise to Pb2+ at anode.