मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

Give SI unit of resistivity.

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प्रश्न

Give SI unit of resistivity.

State resistivity of S.I unit.

अति संक्षिप्त उत्तर
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उत्तर

The SI unit of resistivity is Ω m.

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पाठ 5: Electrochemistry - Very short answer questions

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संबंधित प्रश्‍न

0.05 M NaOH solution offered a resistance of 31.6 Ω in a conductivity cell at 298 K. If the cell constant of the cell is 0.367 cm-1, calculate the molar conductivity of NaOH solution.


The molar conductivity of 0.05 M BaCl2 solution at 25° C is 223Ω-1 cm2 mol-1. What is its conductivity?


What is a cell constant? What are its units? How is it determined experimentally?


Answer the following in one or two sentences.

Write the relationship between conductivity and molar conductivity and hence unit of molar conductivity.


Answer the following in brief.

Explain the effect of dilution of the solution on conductivity.


Answer the following:

What is Kohlrausch law of independent migration of ions? How is it useful in obtaining molar conductivity at zero concentration of a weak electrolyte? Explain with an example.


In case of weak electrolyte the graph Λ vs `sqrt"c"` is _______.


Write three important steps required to determine molar conductivity.


Molar conductance of BaCl2, H2SO4 and HCl at infinite dilution are X1, X2 and X3 respectively. Molar conductance of BaSO4 at infinite dilution is ____________.


The molar conductance of 0.001 M acetic acid is 50 ohm−1 cm2 mol−1. The limiting molar conductance is 250 ohm−1 cm2 mol−1. What is its degree of ionization?


The molar conductances at infinite dilution `(∧_0)` for electrolytes B+A− and C+A− are 140 and 120 S cm2 mol−1. The molar conductance at infinite dilution for B+X− is 198 S cm2 mol−1. The `∧_0` (in S cm2 mol−1) of C+X− is __________.


The molar conductivities at zero concentration for Ca2+ and CaCl2 are 104 and 256.8 Ω−1 cm2 mol−1 respectively. The molar conductivity at zero concentration for Cl− is ____________.


The SI unit of resistivity and molar conductivity are respectively ____________.


Which of the following graph represents the variation of `∧` with `sqrt"c"` for acetic acid solution?


Conductivity of a conductor is ____________.


What is the unit of electrical conductance?


If the conductivity of 0.08 M KCl solution is 2 × 10-2 Ω-1, what is the molar conductivity of the solution?


If the resistivity of 0.1 M KCI solution is 50 Ω cm, what is it's molar conductivity?


Calculate molar conductivity for 0.5 M BaCl2 if its conductivity at 298K is 0.01 Ω–1 cm–1.


A conductivity cell filled with 0.02 M AgNO3 gives at 25°C resistance of 947 ohms. If the cell constant is 2.3 cm-1, what is the molar conductivity of 0.02 M AgNO3 at 25°C?


Define the term cell constant.


Write the relation between molar conductivity and molar ionic conductivities for the electrolytes:

  1. Na2SO4
  2. AlCl3

The molar conductivity of a 0.02 mol dm−3 solution of sodium hydroxide is 230.5 Ω−1 cm2 mol−1. What is its conductivity?


Two solutions have the ratio of their concentrations 0.4 and ratio of their conductivities 0.216. What is the ratio of their molar conductivities?


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