What is a salt bridge?

Important Questions on Electrochemistry

HARD

12th Maharashtra Board

IMPORTANT

Chemistry Standard 12>Chapter 5 - Electrochemistry>Exercises>Q 3

Write electrode reactions for the electrolysis of aqueous $\mathrm{NaCl}$.

HARD

12th Maharashtra Board

IMPORTANT

Chemistry Standard 12>Chapter 5 - Electrochemistry>Exercises>Q 3

How many moles of electrons are passed when $0.8$ ampere current is passed for $1$ hour through molten ${\mathrm{CaCl}}_2$?

HARD

12th Maharashtra Board

IMPORTANT

Chemistry Standard 12>Chapter 5 - Electrochemistry>Exercises>Q 3

Construct a galvanic cell from the electrodes ${\mathrm{Co}}^{3\oplus }\mid \mathrm{Co}$ and ${\mathrm{Mn}}^{2\oplus }\mid \mathrm{Mn}. {\mathrm{E}}_{\mathrm{Co}}^0=1.82 \mathrm{V}$
${\mathrm{E}}_{\mathrm{Mn}}^0=-1.18 \mathrm{V}$. Calculate ${\mathrm{E}}_{\mathrm{cell} }^0$.

HARD

12th Maharashtra Board

IMPORTANT

Chemistry Standard 12>Chapter 5 - Electrochemistry>Exercises>Q 3

Using the relationship between ${\mathrm{\Delta G}}^0$ of cell reaction and the standard potential associated with it, how will you show that the electrical potential is an intensive property?

HARD

12th Maharashtra Board

IMPORTANT

Chemistry Standard 12>Chapter 5 - Electrochemistry>Exercises>Q 3

Derive the relationship between standard cell potential and equilibrium constant of cell reaction.

MEDIUM

12th Maharashtra Board

IMPORTANT

Chemistry Standard 12>Chapter 5 - Electrochemistry>Exercises>Q 3

It is impossible to measure the potential of a single electrode. Comment.

HARD

12th Maharashtra Board

IMPORTANT

Chemistry Standard 12>Chapter 5 - Electrochemistry>Exercises>Q 3

Why do the cell potential of lead accumulators decrease when it generates electricity? How the cell potential can be increased?

HARD

12th Maharashtra Board

IMPORTANT

Chemistry Standard 12>Chapter 5 - Electrochemistry>Exercises>Q 3

Why do the cell potential of lead accumulators decrease when it generates electricity? How the cell potential can be increased?