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The emf of the following three galvanic ...

The emf of the following three galvanic cells :`1. Zn//Zn^(2+) ( 1M) || Cu^(2+) (1 M) //Cu`
`2. Zn//ZN^(2+ ) (1 M)|| Cu^(2+) //cu
`3. Zn//Zn^(2+) (1 M) || Cu^(2+) (0.1 M) Cu`
are repersented by `E_1, E_2, E_3` which of the following statement is true ?

A

`E_(2)gtE_(1)gtE_(3)`

B

`E_(3)gtE_(2)gtE_(1)`

C

`E_(1)gtE_(2)gtE_(3)`

D

`E_(3)gtE_(1)gtE_(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
Emf depends on solution pressure.
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E_(1) , E_(2) and E_(3) are the emfs of the following three galvanic cells respectively I. Zn((s)) | Zn^(2+) (0.1M) | | CU^(2+) (1M) | Cu((s)) II. Zn((s)) ZN^(2+) (1M) || Cu^(2+)(1M) | Cu(s) III. Zn(s) | Zn^(2+) (1M) || CU^(2+)(0.1M)CU(s)

If E_(1),E_(2) and E_(3) are the emf values of the three galvanic cells respectivley (i) Zn|Zn^(2+)(1M)||Cu^(2+)(0.1M)|Cu (ii) Zn|Zn^(2+)(1M)||Cu^(2+)(1M)|Cu (iii) Zn|Zn^(2+)(0.1)||Cu^(2+)(1M)|Cu . Which one of the following is true.

The standard cell potential for the cell Zn|Zn^(2+) (1 M)|| Cu^(2+) (1 M)| Cu Given E_(Cu^(2+)//Cu)^(@) = 0.34 V and E_(Zn^(2+)//Zn)^(@) = - 0.76 V is

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