You visited us 1 times! Enjoying our articles? Unlock Full Access!

Secondary Cells

The EMF of th...

Question

The EMF of the following cells are:
$C u | C u^{2 +} (1 M) | | A g^{+} (1 M) | A g, E^{0} = 0.46 V$
$Z n | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u, E^{0} = 1.10 V$
The EMF of the cell
$Z n | Z n^{2 +} (1 M) | | A g^{+} (1 M) | A g$ will be:

1.56 V

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

0.64 V

No worries! We‘ve got your back. Try BYJU‘S free classes today!

-1.56 V

No worries! We‘ve got your back. Try BYJU‘S free classes today!

2.02 V

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A 1.56 V
$C u + 2 A g^{+} \to 2 A g + C u^{+ 2}$ $E_{1}^{0} = 0.46 V$
$Z n + C u^{+ 2} \to Z n^{+ 2} + C u$ $E_{2}^{0} = 1.10 V$
$Z n + 2 A g^{+} \to Z n^{+ 2} + 2 A g$ $E_{3}^{0}$
$G_{3}^{0} = G_{1}^{0} + G_{2}^{0}$
$n F E_{3}^{0} = n F E_{1}^{0} + n F E_{2}^{0}$ $n$ is $2$ in all
Hence $E_{3}^{0} = 0.46 V + 1.10 V = 1.56 V$

Suggest Corrections

Similar questions

C u | C u^{2 +} (1 M) | | A g^{+} (1 M) | A g, E^{o} = 0.46 V

Z n | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u, E^{o} = 1.10 V

Z n | Z n^{2 +} | | A g^{+} (1 M) | A g

(E^{\circ})

A g / A g^{+} (1 M) ∥ C u^{2 +} (1 M) | C u; E^{\circ} = - 0.46 v o l t

Z n / Z n^{2 +} (1 M) ∥ C u^{2 +} (1 M) | C u; E^{\circ} = + 1.10 v o l t

Z n | Z n^{2 +} (1 M) ∥ A g^{+} (1 M) | A g

E_{1}, E_{2}, E_{3}

Z n | Z n_{1 M}^{2 +} | | C u_{0.1 M}^{2 +} | C u

Z n | Z n_{1 M}^{2 +} | | C u_{1 M}^{2 +} | C u

Z n | Z n_{0.1 M}^{2 +} | | C u_{1 M}^{2 +} | C u

Below given are emf of three galvanic cells, represented by $E_{1}$ , $E_{2}$ and $E_{3}$ . Which of the following is true?

I. $Z n | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u$

II. $Z n | Z n^{2 +} (0.1 M) | | C u^{2 +} (1 M) | C u$

III. $Z n | Z n^{2 +} (1 M) | | C u^{2 +} (0.1 M) | C u$

E_{1}, E_{2}

E_{3}

Z n | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u

Z n | Z n^{2 +} (0.1 M) | | C u^{2 +} (1 M) | C u

Z n | Z n^{2 +} (1 M) | | C u^{2 +} (0.1 M) | C u

Join BYJU'S Learning Program