Tamil Nadu Board of Secondary EducationHSC Science Class 12

Which of the following electrolytic solution has the least specific conductance? - Chemistry


Which of the following electrolytic solution has the least specific conductance?


  • 2N

  • 0.002N

  • 0.02N

  • 0.2N





In general, the specific conductance of an electrolyte decreases with dilution. So, the 0.002N solution has the least specific conductance.

Concept: Conductivity of Electrolytic Solution
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Chapter 9: Electro Chemistry - Evaluation [Page 63]


Tamil Nadu Board Samacheer Kalvi Class 12th Chemistry Volume 1 and 2 Answers Guide
Chapter 9 Electro Chemistry
Evaluation | Q 11. | Page 63


The number of electrons that have a total charge of 9650 coulombs is ____________.

Electrolyte KCl KNO3 HCl NaOAC NaCl
(S cm mol−1)
149.9 145.0 426.2 91.0 126.5

Calculate \[\ce{Λ^∘_{HOAC}}\] using appropriate molar conductances of the electrolytes listed above at infinite dilution in water at 25°C.

Faradays constant is defined as ____________.

A conductivity cell has been calibrated with a 0.01 M, 1 : 1 electrolytic solution (specific conductance (κ = 1.25 × 10−3 S cm−1) in the cell and the measured resistance was 800 Ω at 25°C. The cell constant is, ____________.

Conductivity of a saturated solution of a sparingly soluble salt AB (1 : 1 electrolyte) at 298 K is 1.85 × 10−5 S m−1. Solubility product of the salt AB at 298 K `(Λ_"m"^∘)_"AB"` = 14 × 10−3 S m2 mol−1.

Why does the conductivity of a solution decrease on dilution of the solution?

Which of 0.1 M HCl and 0.1 M KCl do you expect to have greater `Λ_"m"^∘` and why?

Arrange the following solutions in the decreasing order of specific conductance.

i) 0.01 M KCl

ii) 0.005 M KCl

iii) 0.1 M KCl

iv) 0.25 M KCl

v) 0.5 M KCl

0.1 M NaCl solution is placed in two different cells having cell constant 0.5 and 0.25 cm−1 respectively. Which of the two will have a greater value of specific conductance.

Ionic conductance at infinite dilution of Al3+ and \[\ce{SO^{2-}_4}\] are 189 and 160 mho cm2 equiv−1. Calculate the equivalent and molar conductance of the electrolyte Al2(SO4)3 at infinite dilution.


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