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

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Q1ChemistryUnit 7: Redox Reactions and Electrochemistry

A half cell reaction is one which:

Q2ChemistryUnit 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.

Q3ChemistryUnit 7: Redox Reactions and Electrochemistry

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

Q4ChemistryUnit 7: Redox Reactions and Electrochemistry

The life span of a Daniel cell may increased by:

Q5ChemistryUnit 7: Redox Reactions and Electrochemistry

Internal resistance of a battery cell increases with:

Q6ChemistryUnit 7: Redox Reactions and Electrochemistry

E^{o}

values for the half cell reactions are given:

\boldsymbol{C u}^{2+}+\boldsymbol{e}^{-} \rightarrow \boldsymbol{C u}^{+} ; \boldsymbol{E}^{o}=\mathbf{0 . 1 5 V}

\boldsymbol{C u}^{2+}+\mathbf{2} e^{-} \rightarrow \boldsymbol{C u} ; \boldsymbol{E}^{o}=\mathbf{0 . 3 4} \mathbf{v}

What will be the

E^{o}

of the half-cell:

\boldsymbol{C u}^{+}+\boldsymbol{e}^{-} \rightarrow \boldsymbol{C u} ?

Q7ChemistryUnit 7: Redox Reactions and Electrochemistry

The number of faradays of electricity required to decompose

100 \mathrm{ml}

water (density

=0.99 \mathrm{gm} / \mathrm{ml}

) is:

Q8ChemistryUnit 7: Redox Reactions and Electrochemistry

What is the electric current required to deposit 0.972 g of chromium in three hours? (E.C.E. of chromium is 0.00018 g/c)

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