Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 8

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IMPORTANT

Earn 100

Three faradays of electricity was passed through an aqueous solution of iron $(II)$ bromide. The mass of iron metal (at. mass $56$ ) deposited at the cathode is -

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Important Questions on Electrochemistry

HARD

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 9

The ionisation constant of a weak acid electrolyte is

25 \times 10^{- 6}

, while the equivalent conductance of its

0.01 M

solution is

19.6 S {cm}^{2} {eq}^{- 1}

. The equivalent conductance of the electrolyte at infinite dilution (in

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

) will be:

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 10

Molar conductances of

{BaCl}_{2}, H_{2} {SO}_{4}

and

HCl

at infinite dilutions are

x_{1}, x_{2}

and

x_{3}

, respectively. Equivalent conductance of

{BaSO}_{4}

at infinite dilution will be:

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 11

The efficiency of a fuel cell is

80 %

and standard enthalpy of the reaction is

- 300 kJ {mol}^{- 1}

. The reaction involves two electrons in the redox change. What is the value of

E_{cell}^{o}

?

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 12

$λ_{{ClCH}_{2} COONa} =224 {ohm}^{-1} {cm}^{2} gm {eq}^{-1}, λ_{NaCl} =38.2 {ohm}^{-1} {cm}^{2} gm {eq}^{-1}, λ_{HCl} =203 {ohm}^{-1} {cm}^{2} gm {eq}^{-1},$

What is the value of $λ_{{ClCH}_{2} COOH}$ ?

EASY

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 13

Which of the following reactions cannot be used to set up the electrochemical cell?

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 14

Which one of the following is an incorrect statement for an electrochemical cell?

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Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 15

Among

Na, Hg, S, Pt

and graphite, which of them can be used as electrodes in the electrolytic cells having aqueous solutions?

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IMPORTANT

Chemistry Crash Course JEE Main>Chapter 10 - Electrochemistry>Level 1>Q 16

If the same quantity of electricity is passed through two electrolytes, if

A

and

B

are the two substances, liberated at the respective electrodes, then, the Faraday’s second law of electrolysis can be expressed as _______.