Recent questions and answers in Electrochemistry

$H_3PO_4$ is a tribasic acid and one of its salts is $NaH_2PO_4$. What volume of $1\; M\; NaOH$ solution should be added to $12\; g$ of $NaH_2PO_4$ to convert it into $Na_3PO_4$ ? $(H = 1, O = 16, Na = 23, P = 31)$

answered Jan 18, 2016 by meena.p

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A dilute aqueous solution of $Na_2SO_4$ is electrolysed using platinum electrodes.The products at the anode and cathode are

answered Jul 23, 2014 by sreemathi.v

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Of the following,the metals that cannot be obtained by electrolysis of the aqueous solution of their salts are

answered Jul 23, 2014 by sreemathi.v

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Which of the following does not evolve oxygen at anode when the electrolysis is carried out of

answered Jul 23, 2014 by sreemathi.v

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In acidic medium,$MnO_4^-$ is converted to $Mn^{2+}$ when acts as an oxidizing agent.The quantity of electricity required to reduce 0.05 mol of $MnO_4^-$ would be

answered Jul 23, 2014 by sreemathi.v

1 answer

In an electrolysis of a metallic chloride 3.283 g of the metal (molar mass $197gmol^{-1}$) was deposited on the cathode by the passage of 4825C of electric charge.The charge number of metal ion is

answered Jul 23, 2014 by sreemathi.v

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In the electrolysis of alkaline water,a total of 1 mol of gases is evolved.The amount of water decomposed would be

answered Jul 23, 2014 by sreemathi.v

1 answer

The reaction occuring at anode when the electrolysis of $CuSO_4$ is done using Pt electrode,is

answered Jul 23, 2014 by sreemathi.v

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On passing an electric current,the quantity of deposition of a metal on cathode depends on the

answered Jul 23, 2014 by sreemathi.v

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In the electrolysis of $CuCl_2$ solution using copper electrode,if 2.5g of Cu is deposited at cathode,then at anode

answered Jul 23, 2014 by sreemathi.v

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In an electrolysis of an aqueous solution of sodium sulphate,2.4L of oxygen at STP was liberated at anode.The volume of hydrogen at STP liberated at cathode would be

answered Jul 23, 2014 by sreemathi.v

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When a lead storage cell is charged

answered Jul 23, 2014 by sreemathi.v

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The time required to coat a metal surface of $80cm^2$ with $5\times 10^{-3}$cm thick layer of silver (density $10.5gcm^{-3})$ with the passage of 3A current through a silver nitrate solution is

answered Jul 23, 2014 by sreemathi.v

1 answer

A current of $9.65A$ is passed for 3h between nickel electrodes in 0.5L of a 2M solution of $Ni(NO_3)_2$.The molarity of solution after electrolysis would be

answered Jul 23, 2014 by sreemathi.v

1 answer

The density of Cu is $8.94gcm^{-3}$.The quantity of electricity needed to plate an area 10 cm $\times$ 10 cm to a thickness of $10^{-2}$cm using $CuSO_4$ solution is

answered Jul 23, 2014 by sreemathi.v

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In an electrolytic cell,which of the facts is not true?

answered Jul 23, 2014 by sreemathi.v

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Which of the following expressions regarding the electrolysis of an electrolytic solution is represented correctly?

answered Jul 23, 2014 by sreemathi.v

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Which of the following expressions is written correctly?

answered Jul 23, 2014 by sreemathi.v

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When a lead storage battery is discharged

answered Jul 23, 2014 by sreemathi.v

1 answer

A solution of sodium sulphate in water is electrolysed using inert electrodes.The products at the cathode and anode are respectively

answered Jul 23, 2014 by sreemathi.v

1 answer

Faraday's law of electrolysis are related to the

answered Jul 23, 2014 by sreemathi.v

1 answer

Molten sodium chloride conducts electricity due to the presence of

answered Jul 23, 2014 by sreemathi.v

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For the electrochemical cell,$M|M^+||X^-|X,E^{\large\circ}(M^+|M)=0.44V$ and $E^{\large\circ}(X|X^-)=0.33V$.From this data one can deduce that

answered Jul 22, 2014 by sreemathi.v

1 answer

A gas X at 1 atm is bubbled through a solution containing a mixture of 1M Y and 1M Z at $25^{\large\circ}C$.If the reduction potential of $Z > Y > X$,then

answered Jul 22, 2014 by sreemathi.v

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The standard reduction potential values of three metallic cations,X,Y,Z are 0.52,-3.03 and -1.18V,respectively.The order of reducing power of the corresponding metals is

answered Jul 22, 2014 by sreemathi.v

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A standard hydrogen electrode has zero electrode potential because

answered Jul 22, 2014 by sreemathi.v

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The standard reduction potentials of $Cu^{2+}|Cu$ and $Cu^{2+}|Cu^+$ are 0.337V and 0.153V, respectively.The standard electrode potential of $Cu^+|Cu$ half cell is

answered Jul 22, 2014 by sreemathi.v

1 answer

A solution containing one mole per litre each of $Cu(NO_3)_2,AgNO_3,Hg_2(NO_3)_2$ is being electrolysed by using inert electrodes.The values of standard potentials are $E^{\large\circ}_{Ag^+|Ag}=0.80V,E^{\large\circ}_{Hg_2^{2+}|Hg}=0.79V,E^{\large\circ}_{Cu^{2+}|Cu}=0.34V,E^{\large\circ}_{Mg^{2+}|Mg}=-2.3V$ with increasing voltage,the sequence of deposition of metals on the cathode will be

answered Jul 22, 2014 by sreemathi.v

1 answer