JEE MAIN · CHEMISTRY · ELECTROCHEMISTRY
JEE Main Electrochemistry Questions & Solutions
127 solved questions on Electrochemistry, ranging from easy to JEE-Advanced-flavour hard. Click any to see the full solution.
127 solved questions on Electrochemistry, ranging from easy to JEE-Advanced-flavour hard. Click any to see the full solution.
Consider the following cell reaction :$C{d_{(s)}} + H{g_2}S{O_{4(s)}} + {9 \over 5}{H_2}{O_{(l)}}$ $\rightleftharpoons$ $CdS{O_4}.{9 \over 5}{H_2}{O_{(s)}} + 2H{g_{(l)}}$The value…
View solution →For a strong electrolyte, a plot of molar conductivity against (concentration) ${ }^{1 / 2}$ is a straight line, with a negative slope, the correct unit for the slope is
View solution →250 mL of a waste solution obtained from the workshop of a goldsmith contains 0.1 M AgNO3 and 0.1 M AuCl. The solution was electrolyzed at 2V by passing a current of 1A for 15…
View solution →Molar ionic conductivities of divalent cation and anion are $57 \mathrm{~S~cm}^2 \mathrm{~mol}^{-1}$ and $73 \mathrm{~S~cm}^2 \mathrm{~mol}^{-1}$ respectively. The molar…
View solution →Consider the following reaction$MnO_4^ - + 8{H^ + } + 5{e^ - } \to M{n^{ + 2}} + 4{H_2}O,{E^o} = 1.51V$.The quantity of electricity required in Faraday to reduce five moles of…
View solution →The reaction at cathode in the cells commonly used in clocks involves.
View solution →The molar conductivity of a conductivity cell filled with 10 moles of 20 mL NaCl solution is ${\Lambda _{m1}}$ and that of 20 moles another identical cell heaving 80 mL NaCl…
View solution →The cell potential for $$\mathrm{Zn}\left|\mathrm{Zn}^{2+}(\mathrm{aq})\right|\left|\mathrm{Sn}^{x+}\right| \mathrm{Sn}$$ is $0.801 \mathrm{~V}$ at $298 \mathrm{~K}$. The reaction…
View solution →What pressure (bar) of $\mathrm{H}_2$ would be required to make emf of hydrogen electrode zero in pure water at $25^{\circ} \mathrm{C}$ ?
View solution →The quantity of silver deposited when one coulomb charge is passed through $\mathrm{AgNO}_3$ solution :
View solution →$0.2 \%(\mathrm{w} / \mathrm{v})$ solution of NaOH is measured to have resistivity $870.0 \mathrm{~m} \Omega \mathrm{~m}$. The molar conductivity of the solution will…
View solution →For lead storage battery pick the correct statements A. During charging of battery, $\mathrm{PbSO}_{4}$ on anode is converted into $\mathrm{PbO}_{2}$ B. During charging of…
View solution →A metal surface of $100 \mathrm{~cm}^{2}$ area has to be coated with nickel layer of thickness $0.001 \mathrm{~mm}$. A current of $2 \mathrm{~A}$ was passed through a solution of…
View solution →Match List - I with List - II List - I(Parmeter) List - II(Unit) (a) Cell constant (i) $S\,c{m^2}mo{l^{ - 1}}$ (b) Molar conductivity (ii) Dimensionless (c) Conductivity (iii)…
View solution →At 298 K, a 1 litre solution containing 10 mmol of $\mathrm{C{r_2}O_7^{2 - }}$ and 100 mmol of $\mathrm{Cr^{3+}}$ shows a pH of 3.0. Given : $\mathrm{C{r_2}O_7^{2 - } \to C{r^{3 +…
View solution →For an electrochemical cell Sn(s) | Sn2+ (aq,1M)||Pb2+ (aq,1M)|Pb(s) the ratio ${{\left[ {S{n^{2 + }}} \right]} \over {\left[ {P{b^{2 + }}} \right]}}$ when this cell attains…
View solution →$\mathrm{O}_2$ gas will be evolved as a product of electrolysis of : (A) an aqueous solution of $\mathrm{AgNO}_3$ using silver electrodes. (B) an aqueous solution of…
View solution →A constant current was passed through a solution of $\mathrm{AuCl}_4^{-}$ ion between gold electrodes. After a period of 10.0 minutes, the increase in mass of cathode was $1.314…
View solution →Emf of the following cell at 298K in V is x $\times$ 10$-$2.Zn|Zn2+(0.1 M)||Ag+ (0.01 M)|AgThe value of x is _________. (Rounded off to the nearest integer)[Given : $$E_{Z{n^{2 +…
View solution →If the conductivity of mercury at 0$^\circ$C is 1.07 $\times$ 106 S m$-$1 and the resistance of a cell containing mercury is 0.243$\Omega$, then the cell constant of the cell is x…
View solution →The values of conductivity of some materials at $298.15 \mathrm{~K}^{-1} ~\text{in} ~\mathrm{Sm}^{-1}$ are $2.1 \times 10^3$, $1.0 \times 10^{-16}, 1.2 \times 10,3.91,1.5 \times…
View solution →A KCl solution of conductivity 0.14 S m$-$1 shows a resistance of 4.19$\Omega$ in a conductivity cell. If the same cell is filled with an HCl solution, the resistance drops to…
View solution →For the electro chemical cell $\mathrm{M}\left|\mathrm{M}^{2+}\right||\mathrm{X}| \mathrm{X}^{2-}$ If $\mathrm{E}_{\left(\mathrm{M}^{2+} / \mathrm{M}\right)}^0=0.46 \mathrm{~V}$…
View solution →In which of the following half cells, electrochemical reaction is pH dependent?
View solution →Consider the cell $$\mathrm{Pt(s)|{H_2}(g)\,(1\,atm)|{H^ + }\,(aq,[{H^ + }] = 1)||F{e^{3 + }}(aq),F{e^{2 + }}(aq)|Pt(s)}$$ Given $\mathrm{E_{F{e^{3 + }}/F{e^{2 + }}}^o =…
View solution →For the cellCu(s) | Cu2+ (aq) (0.1 M) || Ag+(aq) (0.01 M) | Ag(s)the cell potential E1 = 0.3095 VFor the cellCu(s) | Cu2+ (aq) (0.01 M) || Ag+(aq) (0.001 M) | Ag(s)the cell…
View solution →Reduction potential of ions are given below: $$\begin{array}{ccc} \mathrm{ClO}_4^{-} & \mathrm{IO}_4^{-} & \mathrm{BrO}_4^{-} \\ \mathrm{E}^{\circ}=1.19 \mathrm{~V} &…
View solution →Which one of the following statements is correct for electrolysis of brine solution?
View solution →What would be the electrode potential for the given half cell reaction at pH = 5? ______. 2H2O $\to$ O2 + 4H$\oplus$ + 4e– ; $E_{red}^0$ = 1.23 V (R = 8.314 J mol–1 K–1 ;…
View solution →The conductivity of a weak acid HA of concentration 0.001 mol L$-$1 is 2.0 $\times$ 10$-$5 S cm$-$1. If $\Lambda _m^o$(HA) = 190 S cm2 mol$-$1, the ionization constant (Ka) of HA…
View solution →Consider the cell $$\mathrm{Pt}_{(\mathrm{s})}\left|\mathrm{H}_{2}(\mathrm{~g}, 1 \mathrm{~atm})\right| \mathrm{H}^{+}(\mathrm{aq}, 1 \mathrm{M})|| \mathrm{Fe}^{3+}(\mathrm{aq}),…
View solution →Consider the cell at 25$^\circ$CZn | Zn2+ (aq), (1M) || Fe3+ (aq), Fe2+ (aq) | Pt(s)The fraction of total iron present as Fe3+ ion at the cell potential of 1.500 V is x $\times$…
View solution →For the disproportionation reaction 2Cu+(aq) ⇌ Cu(s) + Cu2+(aq) at 298 K. ln K (where K is the equilibrium constant) is ___________ × 10–1. Given : ($E_{C{u^{2 + }}/C{u^ +…
View solution →For the galvanic cell,Zn(s) + Cu2+ (0.02 M) $\to$ Zn2+ (0.04 M) + Cu(s),Ecell = ______________ $\times$ 10$-$2 V. (Nearest integer)[Use : $E_{Cu/C{u^{2 + }}}^0$ = $-$ 0.34 V,…
View solution →Copper reduces NO$_3^ -$ into NO and NO2 depending upon the concentration of HNO3 in solution. (Assuming fixed [Cu2+] and PNO = PNO2), the HNO3 concentration at which the…
View solution →$$\mathrm{FeO_4^{2 - }\buildrel { + 2.2V} \over \longrightarrow F{e^{3 + }}\buildrel { + 0.70V} \over \longrightarrow F{e^{2 + }}\buildrel { - 0.45V} \over \longrightarrow…
View solution →The mass of zinc produced by the electrolysis of zine sulphate solution with a steady current of $0.015 \mathrm{~A}$ for 15 minutes is _________ $\times 10^{-4} \mathrm{~g}$.…
View solution →The limiting molar conductivities of NaI, NaNO3 and AgNO3 are 12.7, 12.0 and 13.3 mS m2 mol$-$1, respectively (all at 25$^\circ$C). The limiting molar conductivity of AgI at this…
View solution →At $298 \mathrm{~K}$, the standard reduction potential for $\mathrm{Cu}^{2+} / \mathrm{Cu}$ electrode is $0.34 \mathrm{~V}$. Given : $\mathrm{K}_{\mathrm{sp}}…
View solution →A 5.0 m mol dm$-$3 aqueous solution of KCl has a conductance of 0.55 mS when measured in a cell of cell constant 1.3 cm$-$1. The molar conductivity of this solution is ___________…
View solution →In a cell, the following reactions take place $$\matrix{ {F{e^{2 + }} \to F{e^{3 + }} + {e^ - }} & {E_{F{e^{3 + }}/F{e^{2 + }}}^o = 0.77\,V} \cr {2{I^ - } \to {I_2} + 2{e^ - }} &…
View solution →Assume a cell with the following reaction$$C{u_{(s)}} + 2A{g^ + }(1 \times {10^{ - 3}}M) \to C{u^{2 + }}(0.250M) + 2A{g_{(s)}}$$$E_{cell}^\Theta = 2.97$ VEcell for the above…
View solution →The cell potential for the given cell at 298 K Pt| H2 (g, 1 bar) | H+ (aq) || Cu2+ (aq) | Cu(s) is 0.31 V. The pH of the acidic solution is found to be 3, whereas the…
View solution →The ${\left( {{{\partial E} \over {\partial T}}} \right)_P}$ of different types of half cells are as follows: .tg {border-collapse:collapse;border-spacing:0;} .tg…
View solution →Given below are two statements :Statement I : The limiting molar conductivity of KCl (strong electrolyte) is higher compared to that of CH3COOH (weak electrolyte).Statement II :…
View solution →Resistance of a conductivity cell (cell constant $129 \mathrm{~m}^{-1}$) filled with $74.5 \,\mathrm{ppm}$ solution of $\mathrm{KCl}$ is $100 \,\Omega$ (labelled as solution 1).…
View solution →A dilute solution of sulphuric acid is electrolysed using a current of 0.10 A for 2 hours to produce hydrogen and oxygen gas. The total volume of gases produced a STP is…
View solution →The cell potential for the following cell Pt |H2(g)|H+ (aq)|| Cu2+ (0.01 M)|Cu(s) is 0.576 V at 298 K. The pH of the solution is __________. (Nearest integer) (Given : $E_{C{u^{2…
View solution →For a Mg | Mg2+ (aq) || Ag+ (aq) | Ag the correct Nernst Equation is :
View solution →Match List - I with List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial,…
View solution →The resistance of a conductivity cell containing 0.01 M KCl solution at 298 K is 1750 $\Omega$. If the conductivity of 0.01 M KCl solution at 298 K is 0.152 $\times$ 10$-$3 S…
View solution →At what pH, given half cell $\mathrm{MnO_{4}^{-}(0.1~M)~|~Mn^{2+}(0.001~M)}$ will have electrode potential of 1.282 V? ___________ (Nearest Integer) Given $$\mathrm{E_{MnO_4^ -…
View solution →The standard electrode potential of $\mathrm{M}^{+} / \mathrm{M}$ in aqueous solution does not depend on
View solution →Given that the standard potentials (Eo) of Cu2+/Cu and Cu+/Cu are 0.34 V and 0.522 V respectively, the Eo of Cu2+/Cu+ :
View solution →Potassium chlorate is prepared by the electrolysis of KCl in basic solution 6OH- + Cl- $\to$ ClO3- + 3H2O + 6e- If only 60% of the current is utilized in the reaction, the time…
View solution →The standard reduction potentials at $298 \mathrm{~K}$ for the following half cells are given below : $$\mathrm{Cr}_2 \mathrm{O}_7^{2-}+14 \mathrm{H}^{+}+6 \mathrm{e}^{-}…
View solution →For the given reactions Sn2+ + 2e$-$ $\to$ Sn Sn4+ + 4e$-$ $\to$ Sn the electrode potentials are ; $E_{S{n^{2 + }}/Sn}^o = - 0.140$ V and $E_{S{n^{4 + }}/Sn}^o = + 0.010$ V. The…
View solution →For the reaction 2Fe3+(aq) + 2I$-$(aq) $\to$ 2Fe2+(aq) + I2(s) the magnitude of the standard molar Gibbs free energy change, $\Delta$rG$_m^o$ = $-$ ___________ kJ (Round off to…
View solution →Fuel cell, using hydrogen and oxygen as fuels, A. has been used in spaceship B. has as efficiency of $40 \%$ to produce electricity C. uses aluminum as catalysts D. is…
View solution →An oxidation-reduction reaction in which 3 electrons are transferred has a $\Delta$Gº of 17.37 kJ mol–1 at 25 oC. The value of Eo cell (in V) is ______ × 10–2. (1 F = 96,500…
View solution →The spin-only magnetic moment value of M3+ ion (in gaseous state) from the pairs Cr3+ / Cr2+, Mn3+ / Mn2+, Fe3+ / Fe2+ and Co3+ / Co2+ that has negative standard electrode…
View solution →An acidic solution of dichromate is electrolyzed for 8 minutes using 2A current. As per the following equation Cr2O72- + 14H+ + 6e– $\to$ 2Cr3+ + 7H2O The amount of Cr3+…
View solution →One Faraday of electricity liberates $x \times 10^{-1}$ gram atom of copper from copper sulphate. $x$ is ________.
View solution →The molar conductivities at infinite dilution of barium chloride, sulphuric acid and hydrochloric acid are 280, 860 and 426 S cm2 mol$-$1 respectively. The molar conductivity at…
View solution →Consider the following redox reaction : $$ \mathrm{MnO}_4^{-}+\mathrm{H}^{+}+\mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4 \rightleftharpoons \mathrm{Mn}^{2+}+\mathrm{H}_2…
View solution →Which out of the following is a correct equation to show change in molar conductivity with respect to concentration for a weak electrolyte, if the symbols carry their usual…
View solution →The equation that is incorrect is :
View solution →Consider the following half cell reaction$$ \text{Cr}_2\text{O}_7^{2-} \, (\text{aq}) + 6\text{e}^- + 14\text{H}^+ \, (\text{aq}) \rightarrow 2\text{Cr}^{3+} \, (\text{aq}) +…
View solution →For the given cell : Cu(s) | Cu2+(C1M) || Cu2+(C2M) | Cu(s) change in Gibbs energy ($\Delta$G) is negative, if :
View solution →Alkaline oxidative fusion of $\mathrm{MnO}_2$ gives "A" which on electrolytic oxidation in alkaline solution produces B. A and B respectively are
View solution →$1 \times 10^{-5} ~\mathrm{M} ~\mathrm{AgNO}_{3}$ is added to $1 \mathrm{~L}$ of saturated solution of $\mathrm{AgBr}$. The conductivity of this solution at $298 \mathrm{~K}$ is…
View solution →Cu(s) + Sn2+ (0.001M) $\to$ Cu2+ (0.01M) + Sn(s) The Gibbs free energy change for the above reaction at 298 K is x $\times$ 10$-$1 kJ mol$-$1. The value of x is __________.…
View solution →The number of correct statements from the following is __________ A. $\mathrm{E_{\text {cell }}}$ is an intensive parameter B. A negative $\mathrm{E}^{\ominus}$ means that the…
View solution →The reaction; $$\frac{1}{2} \mathrm{H}_{2(\mathrm{~g})}+\mathrm{AgCl}_{(\mathrm{s})} \rightarrow…
View solution →A solution of aluminium chloride is electrolysed for 30 minutes using a current of 2 A . The amount of the aluminium deposited at the cathode is __________ . [Given : molar mass…
View solution →In 3d series, the metal having the highest M2+/M standard electrode potential is :
View solution →The Gibbs change (in J) for the given reaction at [Cu2+] = [Sn2+] = 1 M and 298K is : Cu(s) + Sn2+(aq.) $\to$ Cu2+(aq.) + Sn(s); ($E_{S{n^{2 + }}|Sn}^0 = - 0.16\,V$, $E_{C{u^{2 +…
View solution →Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A) : An aqueous solution of $\mathrm{KOH}$ when used for…
View solution →The magnitude of the change in oxidising power of the $MnO_4^ - /M{n^{2 + }}$ couple is x $\times$ 10$-$4 V, if the H+ concentration is decreased from 1M to 10$-$4 M at…
View solution →Which of the following statements is not correct about rusting of iron?
View solution →A solution of Fe2(SO4)3 is electrolyzed for 'x' min with a current of 1.5 A to deposit 0.3482 g of Fe. The value of x is ___________. [nearest integer] Given : 1 F = 96500 C…
View solution →Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial,…
View solution →The specific conductance of $0.0025 ~\mathrm{M}$ acetic acid is $5 \times 10^{-5} \mathrm{~S} \mathrm{~cm}^{-1}$ at a certain temperature. The dissociation constant of acetic acid…
View solution →The equilibrium constant for the reaction $\mathrm{Zn(s)+Sn^{2+}(aq)}$ $\rightleftharpoons$ $\mathrm{Zn^{2+}(aq)+Sn(s)}$ is $1\times10^{20}$ at 298 K. The magnitude of standard…
View solution →For a cell, $$\mathrm{Cu}(\mathrm{s})\left|\mathrm{Cu}^{2+}(0.001 \,\mathrm{M}) \| \mathrm{Ag}^{+}(0.01 \,\mathrm{M})\right| \mathrm{Ag}(\mathrm{s})$$ the cell potential is found…
View solution →The correct order of reduction potentials of the following pairs is A. Cl2/Cl$-$ B. I2/I$-$ C. Ag+/Ag D. Na+/Na E. Li+/Li Choose the correct answer from the options given below.
View solution →Number of alkanes obtained on electrolysis of a mixture of $\mathrm{CH}_3 \mathrm{COONa}$ and $\mathrm{C}_2 \mathrm{H}_5 \mathrm{COONa}$ is ________.
View solution →In an electrochemical reaction of lead, at standard temperature, if $\mathrm{E}^{0}\left(\mathrm{~Pb}^{2+} / \mathrm{Pb}\right)=\mathrm{m}$ Volt and…
View solution →108 g of silver (molar mass 108 g mol–1) is deposited at cathode from AgNO3(aq) solution by a certain quantity of electricity. The volume (in L) of oxygen gas produced at 273 K…
View solution →$Pt(s)|{H_2}(g)(1\,bar)|{H^ + }(aq)(1\,M)||{M^{3 + }}(aq),{M^ + }(aq)|Pt(s)$ The $\mathrm{E_{cell}}$ for the given cell is 0.1115 V at 298 K when $${{\left[ {{M^ + }(aq)} \right]}…
View solution →The mass of silver (Molar mass of $\mathrm{Ag}: 108 \mathrm{~gmol}^{-1}$ ) displaced by a quantity of electricity which displaces $5600 \mathrm{~mL}$ of $\mathrm{O}_2$ at S.T.P.…
View solution →The emf of cell $$\mathrm{Tl}\left|\underset{(0.001 \mathrm{M})}{\mathrm{Tl}^{+}}\right| \underset{(0.01 \mathrm{M})}{\mathrm{Cu}^{2+}} \mid \mathrm{Cu}$$ is $0.83 \mathrm{~V}$ at…
View solution →The number of incorrect statements from the following is ___________. A. The electrical work that a reaction can perform at constant pressure and temperature is equal to the…
View solution →The electrode potential of M2+/M of 3d-series elements shows positive value for :
View solution →The photoelectric current from Na (Work function, w0 = 2.3 eV) is stopped by the output voltage of the cell Pt(s) | H2 (g, 1 Bar) | HCl (aq., pH =1) | AgCl(s) | Ag(s). The pH of…
View solution →Given below are two statements : Statement (I) : Fusion of $\mathrm{MnO}_2$ with $\mathrm{KOH}$ and an oxidising agent gives dark green $\mathrm{K}_2 \mathrm{MnO}_4$. Statement…
View solution →Given below are two statements : 1 M aqueous solutions of each of Cu(NO3)2, AgNO3, Hg2(NO3)2, Mg(NO3)2 are electrolysed using inert electrodes. Given: E0Ag+/Ag = 0.80 V,…
View solution →The resistance of a conductivity cell with cell constant 1.14 cm$-$1, containing 0.001 M KCl at 298 K is 1500 $\Omega$. The molar conductivity of 0.001 M KCl solution at 298 K in…
View solution →Potassium chlorate is prepared by electrolysis of KCl in basic solution as shown by following equation.6OH$-$ + Cl$-$ $\to$ ClO3$-$ + 3H2O + 6e$-$A current of xA has to be passed…
View solution →The standard electrode potential $\mathrm{(M^{3+}/M^{2+})}$ for V, Cr, Mn & Co are $-$0.26 V, $-$0.41 V, + 1.57 V and + 1.97 V, respectively. The metal ions which can liberate…
View solution →The amount of charge in $\mathrm{F}$ (Faraday) required to obtain one mole of iron from $\mathrm{Fe}_{3} \mathrm{O}_{4}$ is ___________. (Nearest Integer)
View solution →The quantity of electricity in Faraday needed to reduce 1 mol of Cr2O$_7^{2 - }$ to Cr3+ is ____________.
View solution →How can an electrochemical cell be converted into an electrolytic cell ?
View solution →The hydrogen electrode is dipped in a solution of $\mathrm{pH}=3$ at $25^{\circ} \mathrm{C}$. The potential of the electrode will be _________ $\times 10^{-2} \mathrm{~V}$.…
View solution →Based on the data given below : $$\begin{array}{ll} \mathrm{E}_{\mathrm{Cr}_2 \mathrm{O}_7^{2-} / \mathrm{Cr}^{3+}}^{\circ}=1.33 \mathrm{~V} & \mathrm{E}_{\mathrm{Cl}_2 /…
View solution →The logarithm of equilibrium constant for the reaction $\mathrm{Pd}^{2+}+4 \mathrm{Cl}^{-} \rightleftharpoons \mathrm{PdCl}_{4}^{2-}$ is ___________ (Nearest integer) Given :…
View solution →The standard reduction potentials at $298 \mathrm{~K}$ for the following half cells are given below: $$\mathrm{NO}_{3}^{-}+4 \mathrm{H}^{+}+3 \mathrm{e}^{-} \rightarrow…
View solution →These are physical properties of an element(A) Sublimation enthalpy(B) Ionisation enthalpy(C) Hydration enthalpy(D) Electron gain enthalpyThe total number of above properties that…
View solution →The electrode potential of the following half cell at $298 \mathrm{~K}$ $\mathrm{X}\left|\mathrm{X}^{2+}(0.001 \mathrm{M}) \| \mathrm{Y}^{2+}(0.01 \mathrm{M})\right| \mathrm{Y}$…
View solution →The resistivity of a $0.8 \mathrm{M}$ solution of an electrolyte is $5 \times 10^{-3} \Omega~ \mathrm{cm}$. Its molar conductivity is _________ $\times 10^{4}~ \Omega^{-1}…
View solution →The number of correct statements from the following is _______. (A) Conductivity always decreases with decrease in concentration for both strong and weak electrolytes. (B) The…
View solution →The potential for the given half cell at $298 \mathrm{~K}$ is (-) __________ $\times 10^{-2} \mathrm{~V}$ $$ \begin{aligned} & 2 \mathrm{H}_{(\mathrm{aq})}^{+}+2 \mathrm{e}^{-}…
View solution →The amount of electricity in Coulomb required for the oxidation of $1 \mathrm{~mol}$ of $\mathrm{H}_2 \mathrm{O}$ to $\mathrm{O}_2$ is __________ $\times 10^5 \mathrm{C}$.
View solution →Electrolysis of 600 mL aqueous solution of NaCl for 5 min changes the pH of the solution to 12 . The current in Amperes used for the given electrolysis is ___________ . (Nearest…
View solution →Let CNaCl and CBaSO4 be the conductances (in S) measured for saturated aqueous solutions of NaCl and BaSO4, respectively, at a temperature T. Which of the following is false?
View solution →Compound A used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries. Compound A is :
View solution →The reaction $$\frac{1}{2} \mathrm{H}_{2}(\mathrm{~g})+\mathrm{AgCl}(\mathrm{s}) \rightleftharpoons…
View solution →Identify the factor from the following that does not affect electrolytic conductance of a solution.
View solution →One of the commonly used electrode is calomel electrode. Under which of the following categories, calomel electrode comes?
View solution →Which of the following electrolyte can be used to obtain $\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_8$ by the process of electrolysis ?
View solution →Given below are two statements : Statement (I) : Corrosion is an electrochemical phenomenon in which pure metal acts as an anode and impure metal as a cathode. Statement (II) :…
View solution →Standard electrode potentials for a few half cells are mentioned below : $$\begin{aligned} & \mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\circ}=0.34 \mathrm{~V},…
View solution →The standard reduction potential values of some of the p-block ions are given below. Predict the one with the strongest oxidising capacity.
View solution →Match List - I with List - II : List - I (Applications) List - II (Batteries/Cell) (A) Transistors (I) Anode - Zn/Hg; Cathode - HgO + C (B) Hearing aids (II) Hydrogen fuel cell…
View solution →Correct order of limiting molar conductivity for cations in water at 298 K is :
View solution →The standard cell potential $\left(\mathrm{E}_{\text {cell }}^{\ominus}\right)$ of a fuel cell based on the oxidation of methanol in air that has been used to power television…
View solution →On charging the lead storage battery, the oxidation state of lead changes from $x_1$ to $y_1$ at the anode and from $x_2$ to $y_2$ at the cathode. The values of $x_1, y_1, x_2,…
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