EASY

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Which of the following statements about solutions of electrolytes is not correct ?

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Important Questions on Redox Reactions and Electrochemistry

EASY

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

The specific conductance of an aqueous

{KNO}_{3}

solution at

298 K,

for a fixed concentration is

0.024 {ohm}^{- 1} {cm}^{- 1} .

If the resistance of a cell containing this solution at

298 K

was found to be

85 ohm,

then find its cell constant.

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions and 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?

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

The electrical resistance of a column of

0.05 MNaOH

solution of diameter

1 cm

and length

50 cm

6.5 \times 10^{3} ohm .

Its molar conductivity will be

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

The resistance of a conductivity cell containing

0.01 MKCl

solution at

298 K

1750 Ω

. If the conductivity of

0.01 MKCl

solution at

298 K

0.152 \times 10^{- 3} S {cm}^{- 1}

, then the cell constant of the conductivity cell is____

\times 10^{- 3} {cm}^{- 1}

EASY

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

What is the common unit of conductivity if the dimensions are expressed in centimeter?

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

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

EASY

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

If the conductivity of mercury at

0 ° C

1.07 \times 10^{6} S m^{- 1}

and the resistance of a cell containing mercury is

0.243 Ω,

then the cell constant of the cell is

x \times 10^{4} m^{- 1} .

The value of

x

is ______ . (Nearest integer)

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

The molar conductivities of

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

and

{CH}_{3} COONa

at infinite dilution follow the order

EASY

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

What is the SI unit of conductivity?

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

An electrolyte of a polymer-salt complex of poly (ethylene oxide) -

{LiCF}_{3} {SO}_{3}

is shaped into a free standing circular film of

20 mm

diameter and a thickness of

20 μ m .

When it is sandwiched between 2 stainless steel circular electrodes of the same diameter, this cell exhibits a conductance of

\frac{314}{5} S .

What is the specific conductivity of the electrolyte?

EASY

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

Aqueous solution of which of the following compounds is the best conductor of electric current?

EASY

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

Amongst the following, the form of water with the lowest ionic conductance at

298 K

is:

HARD

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

The equivalent conductance of

NaCl

at concentration C and at infinite dilution are

λ_{C}

and

λ_{\infty}

, respectively. The correct relationship between

λ_{C}

and

λ_{\infty}

is given as :
(where the constant B is positive)

HARD

Chemistry>Physical Chemistry>Redox Reactions and 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>Redox Reactions and 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

EASY

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

Consider the statements

S 1

and

S 2

S 1

: Conductivity always increases with decreases in the concentration of electrolyte.

S 2

: Molar conductivity always increases with decreases in the concentration of electrolyte.
The correct option among the following

HARD

Chemistry>Physical Chemistry>Redox Reactions and 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>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

The value of electrical resistance at super conductivity state is

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

Let

C_{NaCl}

and

{C_{BaSO}}_{4}

, be the conductances (in S) measured for saturated aqueous solutions of

NaCl

and

B a S O_{4}

respectively, at a temperature T. Which of the following is false?

EASY

Chemistry>Physical Chemistry>Redox Reactions and Electrochemistry>Electrolytic and Metallic Conduction

The decreasing order of electrical conductivity of the following aqueous solutions is:

(A)

0.1 M

Formic acid,

(B)

0.1 M

Acetic acid,

(C)

0.1 M

Benzoic acid.

Which of the following statements about solutions of electrolytes is not correct ?

Important Questions on Redox Reactions and Electrochemistry

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