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Standard VII

Civics

Representative democracy

Deduce from t...

Question

Deduce from the following Eº values of half cells, what combination of two half cells would result in a cell with the largest potential :

(i) and (iii)

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(i) and (iv)

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(ii) and (iv)

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(iii) and (iv)

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Solution

The correct option is C
(ii) and (iv)

Calculate Eºcell for each.

For (C), Eºcell is maximum.

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Similar questions

Deduced from the following $E^{\circ}$ values of half cells, what combination of two half cells would result in a cell with the largest potential?
(i) $A^{3 -} \to A^{2 -} + e; E^{\circ} = 1.5 V$ (ii) $B^{2 +} + e \to B^{+}; E^{\circ} = 2.1 V$
(iii) $C^{2 +} + e \to C^{+}; E^{\circ} = + 0.5 V$ (iv) $D \to D^{2 +} + 2 e; E^{\circ} = - 1.5 V$

Deduce from the following $E^{⊖}$ values of half cells, what combination of two half cells would results in a cell with the largest potential ?

I. $A + e^{-} \to A^{⊖}, E^{⊖} = - 0.24 V$

II. $B^{⊖} + e^{-} \to B^{2 -}, E^{⊖} = + 1.25 V$

III. $C^{⊖} + 2 e^{-} \to C^{3 -}; E^{⊖} = - 1.25 V$

IV.

A + 2 e^{-} \to D^{2 -}; E^{⊖} = + 0.68 V

Deducted from the following

E^{o}

values of half cells, what combination of two half cells would result in a cell with the largest potential?

(i)

A^{3 -} \to A^{2 -} + e; E^{o} = 1.5 V

(ii)

B^{2 +} + e \to B^{+}; E^{o} = 2.1 V

(iii)

C^{2 +} + e \to C^{+}; E^{o} = + 0.5 V

(iv)

D \to D^{2 +} + 2 e; E^{o} = - 1.5 V

Q. Question 8
The proper representation of a series combination of cells (Figure) obtaining maximum potential is

(a) (i)
(b) (ii)
(c) (iii)
(d) (iv)

Q. Given the following half-cell reactions and corresponding reduction potentials:

S NO	Reaction	$E^{0}$ in volts
I	$A + e^{-} ⟶ A^{-}$	$- 0.24 V$
II	$B + 2 e^{-} ⟶ B^{2 -}$	$+ 1.25 V$
III	$C + 3 e^{-} ⟶ C^{3 -}$	$- 0.25 V$
IV	$D + 2 e^{-} ⟶ D^{2 -}$	$+ 0.68 V$
V	$E + 4 e^{-} ⟶ E^{4 -}$	$- 0.38 V$

Which combination of two half-cell would result in a cell with largest positive

E_{c e l l}^{0}

value for a galvanic cell?

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Deduce from the following Eº values of half cells, what combination of two half cells would result in a cell with the largest potential :

The correct option is C (ii) and (iv) Calculate Eºcell for each. For (C), Eºcell is maximum.

The correct option is C
(ii) and (iv)

Calculate Eºcell for each.

For (C), Eºcell is maximum.