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Which one among Li^(+), Na^(+) and Mg^(2...

Which one among `Li^(+), Na^(+) and Mg^(2+)` is the most powerful oxidising agent? Given : `E_(Li^(+)|Li)^(@)=-3.05V, E_(Na^(+)|Na)^(@)=-2.17V and E_(Mg^(2+)|Mg)^(@)=-2.37V`

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`Na^(+)`
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Which among the following vessels is used to store CuSO_(4) solution ? a Ag vessel [ Given E_(Zn^(2+)|Zn)^(0)=-0.76V, E_(Cu^(2+)|Cu)^(0)=+0.34V and E_(Ag^(+)|Ag)^(0)=0.80V ]

Among Na^(+), Ca^(+). Mg^(+2),Al^(+3) which has high polarising power?

Stability of Fe^(3+) ion is greater than Mn^(3+) ion but less than Cr^(3+) - explain. [Given : E_(Cr^(2+)|Cr)^(0)=-0.9V, E_(Cr^(3+)|Cr^(2+))^(0)=-0.4V E_(Mn^(2+)|Mn)^(0)=-1.2V, E_(Mn^(3+)|Mn^(2+))^(0)=+1.5V E_(Fe^(2+)|Fe)^(0)=-0.4V, E_(Fe^(3+)|Fe^(2+))^(0)=+0.8V ]

Of the elements Zn , Mg Cu and Ag , which are able to produce H_(2) gas when they are treated with dilute HCl solutions ? [ Given E_(Zn^(2+)|Zn)^(@)= -0.76 V , E_(Mg^(2+)|Mg)^(@) = - 1.20 V, E_(Cu^(2)+|Cu)^(@)+0.34 V and E_(Ag^(+)|Ag)^(@) = + 0.80 V ]

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]

Fe has a much lower tendency to get oxidised than Mn and Cr - explain. [Given : E_(Cr^(2+)|Cr)^(0)=-0.9V, E_(Cr^(3+)|Cr^(2+))^(0)=-0.4V E_(Mn^(2+)|Mn)^(0)=-1.2V, E_(Mn^(3+)|Mn^(2+))^(0)=+1.5V E_(Fe^(2+)|Fe)^(0)=-0.4V, E_(Fe^(3+)|Fe^(2+))^(0)=+0.8V ]

Arrange Al, Cd, Pb & Zn in order of increasing chemical activity. Given : E_(Al^(3+)|Al)^(@)=-1.66V , E_(Cd^(2+)|Cd)^(@)=-0.402V," "E_(Pb^(2+)|Pb)^(@)=-0.126V, E_(Zn^(2+)|Zn)^(@)=-0.76V.

CHHAYA PUBLICATION-ELECTROCHEMISTRY-EXERCISE (VERY SHORT ANSWER-TYPE QUESTIONS )
  1. What does the negative value of E("cell")^(@) of a galvanic cell mean...

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  2. Write the relation between the E("cell")^(@) of a galvanic cell and th...

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  3. Which one among Li^(+), Na^(+) and Mg^(2+) is the most powerful oxidis...

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  4. The standard reduction potential of metals A, B and C are -2.37V, +1.8...

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  5. Arrange Ag^(+), Zn^(2+), H^(+) and Na^(+) in order of their tendency t...

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  6. What is meant by 1 F ?

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  7. What is the significance of (E)/(N)?

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  8. What amount of charge in coulomb is carried by Avagadro number of elec...

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  9. What is the unit of eletrochemical equivalent?

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  10. Write the units of molar conductivity and specific conductance.

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  11. What is the amount of charge carried by 1 mol PO(4)^(3-) ion?

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  12. What is the unit of specific conductance?

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  13. How many coulombs of electricity will be required to reduce 1 mol of M...

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  14. Lambda(m)^(@) values of KCl and KNO(3) is 149.86 and "154.96 ohm"^(-1)...

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  15. The electrolyte A(2)B dissociates in aqueous solution as A(2)B(aq)rarr...

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  16. Which of AlCl(3) and NaCl in molten state will produce 1 gram-atom met...

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  17. How many amperes of current will have to be sent to discharge 1 gram e...

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  18. At a definite temperature, the molar conductivity of a weak electrolyt...

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  19. Why is H(2) gas evolved instead of Na, when aqueous solution of NaCl i...

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  20. What will be the ratio of number of moles of the metals discharged at ...

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