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Standard XII

Chemistry

Electrochemical Cells, Galvanic Cells

In the electr...

Question

In the electrochemical cell $P t (s) | H_{2} (g), 1 a t m | H^{+} (1 M) | | C u^{2 +} (1 M) | C u (s)$ , which one of the following statements is true?

_{2}

is cathode, Cu is anode

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Oxidation occurs at Cu electrode

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Reduction occurs at H

_{2}

electrode

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_{2}

is anode, Cu is Cathode

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Solution

The correct option is D H $_{2}$ is anode, Cu is Cathode
At anode oxidation takes place and at cathode reduction take place
$∴ H_{2}$ is anode and Cu is cathode

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Similar questions

In the electrochemical cell $H_{2} (g), 1 a t m | H^{+} (1 M) | | C u^{2 +} (1 M) | C u (s)$ , which one of the following is the correct value of reduction potential?

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. 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. Assertion :For the Daniell cell,

Z n | Z n^{2 +} | | C u^{2 +} | C u

with

E_{c e l l} = 1.1 v o l t

, the application of opposite potential greater than

1.1 V

results into flow of electrons from cathode to anode. Reason:

Z n

is deposited at anode and

C u

is dissolved at cathode.

Q. Assertion :For the Daniel cell,

Z n | Z n^{2 +} | | C u^{2 +} | C u

with

E_{c e l l} = 1.1 V

, the application of opposite potential greater than

1.1 V

results into flow of electron from cathode to anode. Reason:

Z n

is deposited at anode, and

C u

is deposited at cathode.

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In the electrochemical cell Pt(s)|H2(g),1atm|H+(1M)||Cu2+(1M)|Cu(s), which one of the following statements is true?

The correct option is D H2 is anode, Cu is CathodeAt anode oxidation takes place and at cathode reduction take place∴H2 is anode and Cu is cathode

In the electrochemical cell $P t (s) | H_{2} (g), 1 a t m | H^{+} (1 M) | | C u^{2 +} (1 M) | C u (s)$ , which one of the following statements is true?

The correct option is D H $_{2}$ is anode, Cu is Cathode
At anode oxidation takes place and at cathode reduction take place
$∴ H_{2}$ is anode and Cu is cathode