Which of the following is characteristic of the cathode in a voltaic cell?

It may gain weight during reaction

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Electrons flow to it through the external circuit

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It is where oxidation occurs

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It received electrons from ions in solution

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Solution

The correct options are
A It may gain weight during reaction
B Electrons flow to it through the external circuit
ELECTRO CHEMICAL CELL/GALVANAIC CELL/ VOLTAIC CELL :
A cell in which the chemical energy is transformed into electrical energy.
The chemical reaction occuring in a galvanic cell is always a redox reaction.
During the chemical process, the reduction in free energy will obtain as a result in the form of electrical energy.

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Similar questions

Q. Which of the following statements are correct about voltaic cell?
(I) Chemical energy is converted into electrical energy.
(II) Electrons flow from anode to cathode.
(III) Oxidation occurs at anode.
(IV) Anode is negative and cathode is positive.

(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. Assertion: Voltaic cells harness the energy of redox reactions.
Reason: In a voltaic cell, electron flow occurs through the salt bridge.

In electrolytic cell flow of electron is from :
a)cathod to anode in solution
b)cathode to anode through external supply
c)cathode to anode through internal supply
d)anode to cathode to internal supply

[Doubt: what is internal and external supply here ,Pls explain Concept and answer]

State True or False.

In an electrochemical cell, in the inner circuit current is carried by ions and in the external circuit, current of electrons flows through the metal conductors.

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