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Why is the value of E(Cu^(2+)|Cu)^(0)(+0...

Why is the value of `E_(Cu^(2+)|Cu)^(0)(+0.34V)` positive ?

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The hydration enthalpy of `Cu^(2+)(g)` is not sufficient to convert Cu(s) to `Cu^(2+)(g)`
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The electrode potential for Cu^(2+)(aq)+e rarr Cu^(+)(aq) and Cu^(+)(aq)+e rarr Cu(s) are 0.15V and 0.50V respectively. The value of E_(Cu^2+)|Cu^(@) will be -

Explain why the stability of Cu^(+) io in aqueous solution is lower Cu^(2+) ion . E_(Cu^(2+)|Cu)^(@)= +0.34 "V & "E_(Cu^(+)|Cu)^(@)= +0.52 V

Assertion (A) : Cu is less reactive than hydrogen. Reason (R) : E_(Cu^(2+)|Cu)^(@) is negative.

Why is the aqueous solution of Cu(NO_(3))_(2) acidic?

If E_(Cu^(2+)|Cu^(+))^(@)=+0.15V and E_(Cu^(2+)|Cu)^(@) and E_(Cu^(2+)|Cu)^(@)=+0.34V at 25^(@)C, then E^(@) value of the reaction 2Cu^(+)(aq)rarr Cu^(2+)(aq)+Cu(s) is -

For the cell, Cu|Cu^(2+)||Hg^(2+)|Hg, E_("cell")^(@)=+0.45V . Find the standard reduction potential of Hg^(2+)|Hg electrode. Given : E_(Cu^(2+)|Cu)^(@)=+0.34V.

Arrange K^(+), Zn^(2+), H^(+), Cu^(2+) ions in order of their tendency to be liberated at cathode. [E_(cu^(2+)|Cu)^(@)=+0.34V, E_(2H^(+)|H_(2))^(@)=0.00V , E_(Zn^(2+)|Zn)^(@)=-0.76V E_(K^(+)|K)^(@)=-2.93V]

Determine DeltaG^(@) and the value of the equilibrium constant for the following reaction occurring in an electrochemical cell at 25^(@)C . Cu(s)+2Ag^(+)(aq)rarr Cu^(2+)(aq)+2Ag(s) Given that, E_(Cu^(2+)|Cu)^(@)=0.34V and E_(Ag^(+)|Ag)^(@)=0.80V

Calculate the value of the equilibrium constant of the following reaction at 298 K: Given: E_(Cu^(2+)|Cu)^(@)=+0.34V and E_(Cl_(2)|2Cl^(-))^(@)=+1.36V

CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -EXERCISE (VERY SHORT ANSWER-TYPE QUESTIONS)
  1. Which is a stronger reducing agent among Cr^(2+) and Fe^(2+) ?

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  2. Why is d^(1) configuration of transition elements highly unstable ?

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  3. Why is the value of E(Cu^(2+)|Cu)^(0)(+0.34V) positive ?

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  4. Standard reduction potential (E^(0)) of Mn^(3+)|Mn^(2+) system is high...

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  5. Why does Mn^(2+) exhibit the highest paramagnetism among the bivalent ...

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  6. What do you obtain if MnO(2) is fused with solid KOH in air ?

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  7. What is the higher oxidation state exhibited by actinoids ?

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  8. Why are Eu^(2+) and Yb^(2+) highly stable ?

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  9. How many unpaired electrons are there in Gd(Z = 64) atom ?

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  10. What is the structure of manganate ion ?

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  11. What is the common oxidation state of the lanthanoids ?

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  12. Why do transition metals have high atomisation energy ?

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  13. Why do transition elements exhibit variable oxidation states ?

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  14. In volumetric analysis, why is K(2)Cr(2)O(7) used to prepare the stand...

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  15. Why is KMnO(4) stored in dark coloured bottles ?

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  16. Why does explosion occur if conc. H(2)SO(4) is added to KMnO(4) ?

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  17. Why is Fe^(2+) ion smaller than Mn^(2+) ion ?

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  18. Why do transition elements form coloured compounds ?

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  19. Complete the reaction : TiCl(4)+H(2)O to

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  20. Why does zinc have the lowest atomisation energy (126 kJ.mol^(-1)) amo...

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