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The E^(0) values are Zn^(2+)//Zn:-0.7...

The `E^(0)` values are
`Zn^(2+)//Zn:-0.76V,Fe^(2+)//Fe:-0.44V`,
`Ni^(2+)//Ni:-0.25V`
`Cu^(2+)//Cu:+0.34V,Ag^(+)//Ag:+0.80V`,
`Mn^(2+)//Mn: - 1.21V`
`Pt^(2+)//Pt: +1.20V`
The element that does not displace hydrogen from dilute acids is

A

Zn

B

Mn

C

Cu

D

Fe

Text Solution

Verified by Experts

The correct Answer is:
C
Positive `E_(SRP)^(0)` value.
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The E^(0) values are Zn^(2+)//Zn:-0.76V,Fe^(2+)//Fe:-0.44V , Ni^(2+)//Ni:-0.25V Cu^(2+)//Cu:+0.34V,Ag^(+)//Ag:+0.80V , Mn^(2+)//Mn: - 1.21V Pt^(2+)//Pt: +1.20V The metal that does not displace Cu from the CuSO_(4) solution is

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Given that, E_(Ni^(2+)//Ni)^(@)=-0.25 V, E_(Cu^(2+)//Cu)^(@)=+0.34 V E_(Ag^(+)//Ag)^(@)=+0.80 V, E_(Zn^(2+)//Zn)^(@)=-0.76 V Which of the following redox processes will not take place in specified direction ?

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E^(@) of Fe^(2 +) //Fe = - 0.44 V, E^(@) of Cu //Cu^(2+) = -0.34 V . Then in the cell

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NARAYNA-D BLOCK & TRANSITION ELEMENTS-Level-VI (H.W)
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