Home
Class 12
CHEMISTRY
Resistance of 0.2 M solution of an elec...

Resistance of 0.2 M solution of an electrolyte is `50Omega`. The specific conductance of the solution is `1.3 S m^(-1)`. If resistance of the 0.4 M solution of the same electrolyte is `260 Omega`, its molar conductivity is :

A

`6.25xx10^(-4)S m^(2) "mol"^(-1)`

B

`625xx10^(-4) S m^(2) "mol"^(-1)`

C

`62.5 S m^(2) "mol"^(-1)`

D

`6250 S m^(2) "mol"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
A
`k=1.3 S m^(-1)=1.3xx10^(-2)S cm^(-1)`
`k= 1/R xx (l/a)`
`1.3xx10^(-1)= (1)/(50)xx(l/a)`
`(l/a)= 1.3 xx 10^(-2)xx50=65.0 xx 10^(-2) cm^(-1)`
`Lambda_(m)=(k xx 1000)/(M)`
where `k=1/R xx (l/alpha)=(1)/(26) xx 65.0 xx 10^(-2)`
`Lambda_(m) = (1)/(260) xx (65.0xx10^(-2) xx 1000)/(0.4)`
`=6.25 S "mol"^(-1) cm^(-2)`
`=6.25xx10^(-4) "S mol"^(-1) m^(2)`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    MODERN PUBLICATION|Exercise Recent Examination Questions|17 Videos

  • ELECTROCHEMISTRY

    MODERN PUBLICATION|Exercise Multiple Choice Questions (Level-II)|66 Videos

  • COORDINATION COMPOUNDS

    MODERN PUBLICATION|Exercise Recent Examination Questions|21 Videos

  • ENVIROMENTAL POLLUTION

    MODERN PUBLICATION|Exercise RECENT EXAMINATION QUESTIOS|2 Videos

Similar Questions

Explore conceptually related problems

Resistance of 0.2 M solution of an electrolyte is 50Omega . The specific conductance of the solution is 1.4 S m^(-1) . If resistance of the 0.5 M solution of the same electrolyte is 280 Omega . The molar conductivity of 0.5 M solution of the electrolyte in Sm^(2)"mol"^(-1) is

The resistance of a 0.01 N solution of an electrolyte AB at 328 K is 100 ohm. The specific conductance of the solution is (cell constant =1 cm^(-1) ) :

Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1M is 100 Omega. The conductivity of this solution is 1.29S m ^(-1). Resistance of the same cell when filled with 0.2M of the same solution is 520 Omega. The molar conductivity of 0.2M solution of the electrolyte will be

Density of a 2.05 M solution of acetic acid in water is 1.02 g/ml. The molarity of the solution is :

The molar conductance of a 0.1 M solution of an electrolyte was found to be 400 ohm^(-1) cm^(2) "mol"^(-1) . The cell constant of the cell is 0.1cm^(-1) . The resistance of the solution is :