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Select the correct statement for lambd...

Select the correct statement for `lambda_(m)=E_(m)^(@)-AC^(1//2)`

A

This equation is for weak electrolyte

B

Intercept is equal to `lambda_(m)`

C

slope is `A` s

D

value of A depends on the charge of cation and anion

Text Solution

Verified by Experts

The correct Answer is:
D
`wedge_(m)=E_(m)^(wedge)-AC^(1//2)`
if we plote `E_(m)` against `C^(1//2)` we obtain stright line with intercept equal to `E_(m)^(@)` and slope is equal to A the constant A depends on type of electrolyte i.e charge on cation and anion produced on dissociation of electrolyte
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Conductors allow the passage of electric current through them. Metallic and electrolytic are the two type of conductors. Current carriers in metallic and electrolytic conductors are free electrons and free ions respectively. Specific conductance or consuctivity of the electrolyte solution is given by the following relation : kappa=c xx l/A where, c=1//R is the conductance and l//A is the cell constant. Molar conductance (Lambda_(m)) and equivalence conductance (Lambda_(e)) of an electrolyte solution are calculated using the following similar relations : Lambda_(m)= kappa xx 1000/M Lambda_(e)= kappa xx 1000/N Where, M and N are the molarity and normality of the solution respectively. Molar conductance of strong electrolyte depends on concentration : Lambda_(m)=Lambda_(m)^(@)-b sqrt(c) where, Lambda_(m)^(@)= molar conductance at infinite dilution c= concentration of the solution b= constant The degrees of dissociation of weak electrolytes are calculated as : alpha=Lambda_(m)/Lambda_(m)^(@)=Lambda_(e)/Lambda_(e)^(@) The correct order of equivalent conductances at infinite dilution of LiCl, NaCl and KCl is :

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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ELECTROCHEMISTRY-Exercise 1
  1. Which of the statements about solution of electrolytes is not correct?

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  2. Solubility of a sparingly soluble salt s specific conductance k ...

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  3. Select the correct statement for lambda(m)=E(m)^(@)-AC^(1//2)

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  4. Which of the following statement (s) is /are true ?

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  5. How many coulombs are required in order to reduce 12.3 g of nitrob...

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  6. Consider the following statement I Q=lt II charge is required for...

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  7. Which of the following reaction is preferred at anodes during the...

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  8. Aluminium is produced by the electrolysis of …I ..in the presence o...

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  9. Which of the following statement (s) is /ar flase for elelctrolytic...

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  10. At 298 K, the standard reduction potentials are 1.51 V for MnO(4)^(-) ...

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  11. Using the Gibbs energy change, Delta G^(@)=+ 63.3 kJ, for the followin...

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  12. The two half cell reaction of an electrochemical cell is given as ...

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  13. For Cr(2)O(7)^(2)+14 H^(+)+6e^(-)rarr2Cr^(3+)+7H(2)O E^(@)=1.33 V.At...

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  14. If the E^(@) for a given reaction has a negative value, then which of ...

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  15. The electrode pptenticals for Cu^(2+) (aq) +e^(-) rarr Cu^+ (aq) ...

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  16. Standard electrode potential of three metal X, Y and Z are -1.2 V, +0....

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  17. Given the following reaction involving A,B,C and D (i) C+B^(+)...

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  18. The standard emf of a galvanic cell involving 2 motes of electrons ...

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  19. If the half cel reactions are given as (i) Fe^(2+)(Aq)+2e^(-)rarr F...

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  20. The standard emf of a cell having one electron change is found to be 0...

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