Recent questions in Electrochemistry

The charge required to deposit 9 g of $Al$ from $Al^{3+}$ solution is (At wt of AI=27.0)

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The quantity of electricity needed to deposit $127.08\;g$ of Copper is

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The quantity of electricity needed to deposit $127.08\;g$ of copper is :-

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When $9.65$ coulomb of electricity is passed through a solution of silver nitrate (At mass of Ag $=108\;g\;mol^{-1} $) the amount of silver deposited is

asked Sep 21, 2015 by meena.p

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What is the amount of chlorine evolved when 2 ampere of current is passed for $30$ minutes in an aqueous solution of $Nacl$

asked Sep 21, 2015 by meena.p

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In the electro chemical reaction : $2Fe^{3}+Zn \to 2n^{2+} +2 Fe^{2+}$

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As a lead storage battery is charged :-

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The standard reduction potential values of three metallic cation x,y and z are $0.52,3.03$ and $ -1.18\;v$ respectively . The order of reducing powers of the corresponding metal is :

asked Sep 21, 2015 by meena.p

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The standard reduction potential for $Cu^+ / Cu $ an $Cu^{2+} /Cu^+$ are $0.337\;V$ and $0.153\;V$ respectively . The standard electrode potential of $Cu^+/Cu$ half cell is

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The number of coulombs required for the deposition of $107.87\;g$ of silver is

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The amount of silver deposited on passing $2F$ of electricity through aqueous solution of $AgNo_3$ is :

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The standard electrode potentials of $zn,Ag$ and $Cu$ are $-0.76,0.80$ and $0.34$ volt respectively ; then

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An example of a simple fuel cell is

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When a lead storage battery is charged :-

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Which of the following solutions of NaCl will have the highest specific conductance ?

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What is the number of coulomb required for the conversion of one mole of $Mno^{-}4$ to one mole of $Mn^{2+}$?

asked Sep 21, 2015 by meena.p

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How many silver will be obtained by that quantity of current which displaces $5.6$liters of $H_2$ ?

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Out of Cu, Ag,Fe and Zn the metal which can displace all others from their salt solution is

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$H^{+}$ ions are reduced at platinum electrode prior to :

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Which of the following can be used as an electrode ?

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Which of the following does not occur at cathode ?

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During the electrolysis of fused Nacl, which reaction occurs at anode

asked Sep 18, 2015 by meena.p

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The half - cell reaction is the one that

asked Sep 18, 2015 by meena.p

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The emf of the cell $Zn |Zn^{2+} (1.0 \;M) ||cd^{2+}(1.0\;M) |cd$ is

asked Sep 18, 2015 by meena.p

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The potential of a hydrogen electrode at PH 10 is

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Which of the following gains electrons more easily ?

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In the cell $Zn|Zn^{2+} ||Cu^{2+}|Cu$, the negative electrode is :

asked Sep 18, 2015 by meena.p

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Which metal will be deposited in the galvanic cell$Cu|Cu^{2+}||Ag^+| Ag$

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More electro negative elements have :

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In a galvanic cell energy changes occur like

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K,Ca and Li metals may be arranged in the decreasing order of their standard electrode potentials are

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The reference electrode is made from which of the following ?

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The oxide which can be reduced by hydrogen is :

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A depolarizer used in dry cell is

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Which of the following methods does not liberate hydrogen ?

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Galvanization of iron denotes and counting with

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When iron is rusted , it is :

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The potential of a hydrogen electrode at $PH =1$ is

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Which one will liberate $Br_2$ from $KBr$?

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Which of the following metals is most readily corroded in moist air ?

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The most reactive agent is

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Strongest reducing agent is

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The measured potential for :

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Which reaction will take place at cathode when fused calcium chloride is electrolysed ?

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Which of the following metals does not give the following reaction ? M+water $\to$ oxide or hydroxide +$H_2$

asked Sep 18, 2015 by meena.p

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The metal oxide which decomposes on heating is :

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Strongest reducing agent is :

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The cathodic reaction in electrolysis of dilute $H_2SO_4$ with platinum electrode is :

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When lead accumulator is charged , it is

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All cell do not contain

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