Chemistry · JEE

Electrochemical cells: Electrolytic and Galvanic cells, different types of electrodes, electrode potentials including standard electrode potential, half-cell and cell reactions Mock Test for JEE

41+ syllabus-aligned questions available

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Syllabus context

Part of Redox Reactions and Electrochemistry in JEE Main Chemistry.

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Q1ChemistryUnit 7: Redox Reactions and Electrochemistry

Which of the following statement (s) differentiate between electrochemical cell and electrolytic cell? This question has multiple correct options

Q2ChemistryUnit 7: Redox Reactions and Electrochemistry

A half cell reaction is one which:

Q3ChemistryUnit 7: Redox Reactions and Electrochemistry

The reduction potential of an electrode can be increased by:

Q4ChemistryUnit 7: Redox Reactions and Electrochemistry

The e.m.f. of the cell \begin{tabular}{l|c||c|c}

\boldsymbol{P t} \boldsymbol{H}_{2}

\boldsymbol{H O C N}

\boldsymbol{A} \boldsymbol{g}^{+}

\boldsymbol{1} \boldsymbol{a} \boldsymbol{t m}

\boldsymbol{1} . \boldsymbol{3} \times \mathbf{1 0}^{-\boldsymbol{3}} \boldsymbol{M}

\boldsymbol{0 . 8} \boldsymbol{M}

\end{tabular} \mid

\boldsymbol{A} \boldsymbol{g}(s)

0.982 \mathrm{V} .

The

\mathrm{K}_{a}

for HOCN is :

\boldsymbol{A} \boldsymbol{g}^{+}+\boldsymbol{e} \rightarrow \boldsymbol{A} \boldsymbol{g}(\boldsymbol{s}) ; \boldsymbol{E}^{o}=\mathbf{0 . 8 0} \boldsymbol{V}

Q5ChemistryUnit 7: Redox Reactions and Electrochemistry

Cathodic standard reduction potential minus anodic standard reduction potential is equal to:

Q6ChemistryUnit 7: Redox Reactions and Electrochemistry

Assertion In electrochemical cell, we can not use KCl in the salt bridge if anodic or cathodic compartment consists of

\mathrm{Ag}^{+}

P b^{2+}

ion. Reason Salt bridge is employed to maintain the electrical neutrality and to minimize the liquid-liquid junction potential.

Q7ChemistryUnit 7: Redox Reactions and Electrochemistry

The oxidation potential of a hydrogen electrode at

p H=10

and

P_{H_{2}}=1

is:

Q8ChemistryUnit 7: Redox Reactions and Electrochemistry

The

E_{c e l l}^{o}

for

C u\left|C u^{2+}\right|\left|A g^{+}\right| A g

in volt is

Q9ChemistryUnit 7: Redox Reactions and Electrochemistry

Consider the following concentration cell

Z n(s)\left|Z n^{2+}(0.024 M) \| Z n^{2+}(0.480 M)\right| Z

which of the following statements is/are correct? This question has multiple correct options

Q10ChemistryUnit 7: Redox Reactions and Electrochemistry

Assertion Zinc is used in the galvanization of iron. Reason Its coating on iron articles increases their life by protecting them from rusting.

Q11ChemistryUnit 7: Redox Reactions and Electrochemistry

Among the following, the couple with most positive reduction potential is :

Q12ChemistryUnit 7: Redox Reactions and Electrochemistry

Given below are the half-cell reactions:

M n^{2+}+2 e^{-} \rightarrow M n ; E^{o}=-1.18 V

\mathbf{2}\left(\boldsymbol{M} \boldsymbol{n}^{+\mathbf{3}}+\boldsymbol{e}^{-} \rightarrow \boldsymbol{M} \boldsymbol{n}^{2+}\right) ; \boldsymbol{E}^{\boldsymbol{o}}=

+1.51 V

The

\boldsymbol{E}^{o}

for

\boldsymbol{3} \boldsymbol{M} \boldsymbol{n}^{2+} \rightarrow \boldsymbol{M} \boldsymbol{n}+\boldsymbol{2} \boldsymbol{M} \boldsymbol{n}^{3+}

will be:

Q13ChemistryUnit 7: Redox Reactions and Electrochemistry

In a concentracttion cell:

Q14ChemistryUnit 7: Redox Reactions and Electrochemistry

The life span of a Daniel cell may increased by:

Q15ChemistryUnit 7: Redox Reactions and Electrochemistry

Identify the true statement regarding Daniel cell:

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