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The molar conductivities $(λ_{m}^{0})$ at infinite dilution of $KBr, HBr$ and ${KNH}_{2}$ are $120.5, 420.6$ and $90.48 S {cm}^{2} {mol}^{- 1}$ respectively. Find the value of $λ_{m}^{0}$ for ${NH}_{3}$ .

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Important Questions on Electrochemistry

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 24 - Electrochemistry>AP EAPCET 2021 (19-Aug Afternoon)>Q 1

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

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 24 - Electrochemistry>AP EAPCET 2019 (21-Apr Shift-2)>Q 2

{CuSO}_{4}

solution is electrolysed for

15

minutes to deposit

0.4725 g

of copper at the cathode. The current in amperes required is

(

Faraday

= 96, 500 {Cmol}^{- 1}

, atomic weight of copper

= 63)

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 24 - Electrochemistry>AP EAPCET 2018 (25-APR Shift-1)>Q 3

For the oxidation of

0.2 M {FeSO}_{4}

solution

0.965

amperes current is passed through it for

1

hour. The volume of the solution that is oxidised in

mL

EASY

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 24 - Electrochemistry>AP EAPCET 2021 (19-Aug Forenoon)>Q 4

When a current of

10 A

is passes through molten

{AlCl}_{3}

for

1.608

minutes. The mass of

Al

deposited will be [Atomic mass of

Al = 27 g

]:-

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 24 - Electrochemistry>AP EAPCET 2021 (19-Aug Afternoon)>Q 5

Find the emf of the following cell reaction, given

E_{{Cr}^{3 +} / {cr}^{2 +}}^{0} = - 0.72 V

and

E_{{Fe}^{2 +} / Fe} {}^{0}=

- 0.42 V

25 ° C

Cr |{Cr}^{3 +} (0.1 M) ‖ {Fe}^{2 +} (0.1 M)| Fe

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AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 24 - Electrochemistry>AP EAPCET 2021 (19-Aug Afternoon)>Q 6

For

{Cr}_{2} O_{7}^{2 -} + 14 H^{+} + 6 e^{- yields} ⟶ 2 {Cr}^{3 +} + 7 H_{2} O, E^{0} = 1.33 V

[{Cr}_{2} O_{7}^{2 -}] = 4.5

millimole,

[{Cr}^{3 +}] = 1.5

millimole and

E = 1.067 V

, then calculate the

pH

of the solution.

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AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 24 - Electrochemistry>AP EAPCET - 20 Aug 2021 Forenoon>Q 7

If hydrogen electrons dipped in two solutions of

pH = 3

and

pH = 6

are connected by a salt bridge, the emf of the resulting cell is

MEDIUM

AP EAPCET

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 24 - Electrochemistry>AP EAPCET 2021 (19-Aug Forenoon)>Q 8

The molar conductivities

(λ_{m}^{0})

at infinite dilution of

KBr, HBr

and

{KNH}_{2}

are

120.5, 420.6

and

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

respectively. Find the value of

λ_{m}^{0}

for

{NH}_{3}

The molar conductivities λm0 at infinite dilution of KBr, HBr and KNH2 are 120.5,420.6 and 90.48 S cm2 mol-1 respectively. Find the value of λm0 for NH3.

Important Questions on Electrochemistry

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The molar conductivities $(λ_{m}^{0})$ at infinite dilution of $KBr, HBr$ and ${KNH}_{2}$ are $120.5, 420.6$ and $90.48 S {cm}^{2} {mol}^{- 1}$ respectively. Find the value of $λ_{m}^{0}$ for ${NH}_{3}$ .