The reaction Fe- Fe2-2e-0-44 volt would occur spontaneously with which of the following-I- Pb- Pb2-2e-0-13 volt II- Cu- Cu2-2e-0-34 volt III- 2Ag-2e- 2Ag0-0-80 volt Select the correct option among the following -

The correct option is E I, II and IIIOxidation potential order : Fe gt;Pb gt;Cu gt;Ag As the oxidation potential of Fe is more than Pb, Cu, ...

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Byju's Answer

Standard XII

Chemistry

Electrochemical Cells, Galvanic Cells

The reaction ...

Question

The reaction $F e \to F e^{2 +} + 2 e^{-} (+ 0.44$ volt $)$ would occur spontaneously with which of the following?
I. $P b \to P b^{2 +} + 2 e^{-} (+ 0.13$ volt $)$
II. $C u \to C u^{2 +} + 2 e^{-} (- 0.34$ volt $)$
III. $2 A g^{+} + 2 e^{-} \to 2 A g^{0} (+ 0.80$ volt $)$
Select the correct option among the following :

I only

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III only

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I and III only

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II and III only

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I, II and III

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Solution

The correct option is E I, II and III
Oxidation potential order :
$F e > P b > C u > A g$

As the oxidation potential of $F e$ is more than $P b, C u, A g$ , it can react spontaneously with all three of the substances.

Suggest Corrections

Similar questions

Q. Calculate the

E

and

E^{\circ}

of the cell

N i | N i^{2 +} | | C u^{2 +} | C u

from the following half-cell reactions:

N i^{2 +} + 2 e^{-} \to N i; E^{\circ} = - 0.25 v o l t

C u^{2 +} + 2 e^{-} \to C u; E^{\circ} = + 0.34 v o l t

(Given:

[N i^{2 +}] = 1 M

and

[C u^{2 +}] = 10^{- 3} M)

Q. For

I_{2} + 2 e^{-} \to 2 I^{-} standard reduction potential = + 0.54 Volt .

For

2 B r^{-} \to B r_{2} + 2 e^{-} standard oxidation potential = - 1.09 Volt .

For

F e \to F e^{2 +} + 2 e^{-}, standard oxidation potential = + 0.44 Volt .

Which of the following reaction(s) is/are spontaneous:

Q. For

I_{2} + 2 e^{-} \to 2 I^{-}, standard reduction potential = + 0.54 Volt .

For

2 B r^{-} \to B r_{2} + 2 e^{-}, standard oxidation potential = - 1.09 Volt .

For

F e \to F e^{2 +} + 2 e^{-}, standard oxidation potential = + 0.44 Volt .

Out of the below given reactions, how many reactions are spontaneous in nature (predict from the above data) ?

B r_{2} + 2 I^{-} \to 2 B r^{-} + I_{2}

F e + B r_{2} \to F e^{2 +} + 2 B r^{-}

F e + I_{2} \to F e^{2 +} + 2 I^{-}

I_{2} + 2 B r^{-} \to 2 I^{-} + B r_{2}

F e^{2 +} + 2 e^{-} \to F e

;

E^{\circ} = - 0.44 V

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

;

E^{\circ} = + 0.34 V

The

E^{\circ}

F e + C u^{2 +} ⇋ F e^{2} + C u

is _______ and thus, reaction is spontaneous/nonspontaneous.

C u^{\oplus} + e^{-} \to C u, E^{⊖} = x_{1}

volt

C u^{2 +} + 2 e^{-} \to C u, E^{⊖} = x_{2}

volt, then for

C u^{2 +} + e^{-} \to C u, E^{⊖}

(volt) will be:

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The reaction Fe→Fe2++2e−(+0.44 volt) would occur spontaneously with which of the following?I. Pb→Pb2++2e−(+0.13 volt)II. Cu→Cu2++2e−(−0.34 volt)III. 2Ag++2e−→2Ag0(+0.80 volt)Select the correct option among the following :

The correct option is E I, II and IIIOxidation potential order :Fe>Pb>Cu>AgAs the oxidation potential of Fe is more than Pb,Cu,Ag, it can react spontaneously with all three of the substances.

The correct option is E I, II and III
Oxidation potential order :
$F e > P b > C u > A g$

As the oxidation potential of $F e$ is more than $P b, C u, A g$ , it can react spontaneously with all three of the substances.