Match List - I with List - II : List - I (Parameter) List - II (Unit) (a) Cell constant (i) S cm 2 mol - 1 (b) Molar conductivity (ii) Dimensionless (c) Conductivity (iii) m - 1 (d) Degree of dissociation of electrolyte (iv) Ω - 1 m - 1

(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)

(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)

The molar conductivity of 0 . 05 M BaCl 2 solution at 25 ° C is 223 Ω - 1 cm 2 mol - 1 . What is its conductivity?

Given, Concentration ( C ) = 0 . 05 M Molar conductivity ( λ m ) = 223 Ω - 1 cm 2 mol - 1 As we know, Molar conductivity, λ m = 1000 × k C ⋯ ⋯ ⋯ ⋯ ( i ) ∴ k = λ m × C 1000 ⋯ ⋯ ⋯ ⋯ ⋯ ( ii ) Put all the values in equation ii , = 223 × 0 . 05 1000 = 0 . 01115 S cm - 1 or Ω - 1 cm - 1 Therefore, the molar conductivity of BaCl 2 solution is 0 . 01115 S cm - 1 or Ω - 1 cm - 1 .

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Important Questions on Electrochemistry

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Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

291 K

, saturated solution of

{BaSO}_{4}

was found to have a specific conductivity of

3.648 \times 10^{- 6} {ohm}^{- 1} {cm}^{- 1}

and that of water being used is

1.25 \times 10^{- 6} {ohm}^{- 1} {cm}^{- 1}

. If the ionic conductance's of

{Ba}^{2 +}

and

{SO}_{4}^{2 -}

are

110

and

136.6 {ohm}^{- 1} {cm}^{2} {mol}^{- 1}

respectively, the solubility of

{BaSO}_{4}

291 K

will be [Atomic masses of

Ba - 137, S - 32, 0 - 16]

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

The graph of

\sqrt{C} vs \land_{m}

for an aqueous solution of which substance is not obtained as a straight line?

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Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

Match List - I with List - II :

	List - I (Parameter)		List - II (Unit)
(a)	Cell constant	(i)	$S {cm}^{2} {mol}^{- 1}$
(b)	Molar conductivity	(ii)	Dimensionless
(c)	Conductivity	(iii)	$m^{- 1}$
(d)	Degree of dissociation of electrolyte	(iv)	$Ω^{- 1} m^{- 1}$

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Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

Define the following and write the formula and unit :

Molar conductivity

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

Give a reason for the following.
Conductivity of dilute hydrochloric acid is greater than that of acetic acid.

HARD

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

The molar conductivity of

0.05 M {BaCl}_{2}

solution at

25 ° C

223 Ω^{- 1} {cm}^{2} {mol}^{- 1}

. What is its conductivity?

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

Given below are two statements:
Statement I : The limiting molar conductivity of $KCl$ (strong electrolyte) is higher compared to that of $\mathrm{CH}_{3} \mathrm{COOH}$ (weak electrolyte).
Statement II : Molar conductivity decreases with decrease in concentration of electrolyte.

In the light of the above statements, choose the most appropriate answer from the options given below:

HARD

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

The electrical resistance of a column of

0.1 mol L^{- 1} KOH

solution of area

10 {cm}^{2}

and length

50 cm

5 \times 10^{3} Ω .

The molar conductivity of the solution is

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

The molar conductivity of a

0.5 mol {dm}^{- 3}

solution of

A g N O_{3}

with electrolytic conductivity of

5.76 \times 10^{- 3} S c m^{- 1}

298 K

HARD

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

Which one of the following graphs between molar conductivity

(Λ_{m})

versus

\sqrt{C}

is correct?

EASY

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

Electrical conductivity of an electrolyte depends upon

HARD

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

Resistance of 0.2 M solution of an electrolyte is

50 Ω

. The specific conductance of the solution is

{1.4 S m}^{-1}

. The resistance of 0.5 M solution of the same electrolyte is

280 Ω

. The molar conductivity of 0.5 M solution of the electrolyte in

{S m}^{2} {mol}^{-1}

is :

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

On which of the following factor ionic conductivity of solution does not depend?

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Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

The resistance of conductivity cell with cell constant

1.14 {cm}^{- 1}

, containing

0.001 M KCl

298 K

1500 Ω

. The molar conductivity of

0.001 M KCl

solution at

298 K

S {cm}^{2} {mol}^{- 1}

is (Integer answer)

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Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

25 moles of a weak monoprotic acid

X

are dissolved in

1 L

of water at

298 K

. The conductivity of this solution is measured to be

2 S {cm}^{- 1}

. The limiting molar conductivity

(Λ_{m}^{0})

for

X

in aqueous solution is

200 S {cm}^{2} {mol}^{- 1}

and the vapor pressure of pure liquid

X

in undissociated form at

298 K

30 mmHg

. The partial vapor pressure of

X

in the given solution is
[

1 L

of water has

55

moles of water]

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

Specific conductance of

0.1 M {HNO}_{3}

6.3 \times 10^{- 2} {ohm}^{- 1} {cm}^{- 1}

. The molar conductance of the solution is

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

The molar conductivity of a conductivity cell filled with $10$ moles of $20 mL NaCl$ solution is $Λ_{m 1}$ and that of $20$ moles another identical cell heaving $80 mL NaCl$ solution is $Λ_{m 2}$ , The conductivities exhibited by these two cells are same.

The relationship between $Λ_{m 2}$ and $Λ_{m 1}$ is

EASY

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

The pair of electrolytes that possess same value for the constant

(A)

in the Debye - Huckel - Onsagar equation,

λ_{m} = λ_{m} ° - A \sqrt{C}

MEDIUM

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

The molar conductivities of

HCl, NaCl, {CH}_{3} COOH

and

{CH}_{3} COONa

at infinite dilution follow the order

HARD

Chemistry>Physical Chemistry>Electrochemistry>Electrolytic and Metallic Conduction

The resistance of

0 .01 N

solution of an electrolyte was found to be

220 ohm

298 K

using a conductivity cell with a cell constant of

0.88 cm^{- 1}

. The value of equivalent conductance of solution is-

Metallic conductance decreases with an increase in temperature.

Important Questions on Electrochemistry

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