Electrochemistry · Chemistry · JEE Main

Start Practice

Numerical

JEE Main 2024 (Online) 1st February Evening Shift
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 __________ $\ti...
JEE Main 2024 (Online) 1st February Evening Shift
Consider the following redox reaction : $$ \mathrm{MnO}_4^{-}+\mathrm{H}^{+}+\mathrm{H}_2 \mathrm{C}_2 \mathrm{O}_4 \rightleftharpoons \mathrm{Mn}^{2+...
JEE Main 2024 (Online) 1st February Morning Shift
The potential for the given half cell at $298 \mathrm{~K}$ is (-) __________ $\times 10^{-2} \mathrm{~V}$ $$ \begin{aligned} & 2 \mathrm{H}_{(\mathrm{...
JEE Main 2024 (Online) 31st January Evening Shift
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....
JEE Main 2024 (Online) 31st January Morning Shift
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 ______...
JEE Main 2024 (Online) 31st January Morning Shift
One Faraday of electricity liberates $$x \times 10^{-1}$$ gram atom of copper from copper sulphate. $$x$$ is ________.
JEE Main 2024 (Online) 29th January Evening Shift
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 ...
JEE Main 2024 (Online) 29th January Morning Shift
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 _________ $$\...
JEE Main 2024 (Online) 27th January Evening Shift
The hydrogen electrode is dipped in a solution of $$\mathrm{pH}=3$$ at $$25^{\circ} \mathrm{C}$$. The potential of the electrode will be _________ $$\...
JEE Main 2024 (Online) 27th January Morning Shift
The mass of silver (Molar mass of $$\mathrm{Ag}: 108 \mathrm{~gmol}^{-1}$$ ) displaced by a quantity of electricity which displaces $$5600 \mathrm{~mL...
JEE Main 2023 (Online) 15th April Morning Shift
The number of correct statements from the following is _______. (A) Conductivity always decreases with decrease in concentration for both strong and w...
JEE Main 2023 (Online) 13th April Evening Shift
At $$298 \mathrm{~K}$$, the standard reduction potential for $$\mathrm{Cu}^{2+} / \mathrm{Cu}$$ electrode is $$0.34 \mathrm{~V}$$. Given : $$\mathrm{K...
JEE Main 2023 (Online) 13th April Morning Shift
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 $$2 \mathrm{~A}$...
JEE Main 2023 (Online) 11th April Evening Shift
The number of correct statements from the following is __________ A. $$\mathrm{E_{\text {cell }}}$$ is an intensive parameter B. A negative $$\mathrm{...
JEE Main 2023 (Online) 11th April Morning Shift
In an electrochemical reaction of lead, at standard temperature, if $$\mathrm{E}^{0}\left(\mathrm{~Pb}^{2+} / \mathrm{Pb}\right)=\mathrm{m}$$ Volt and...
JEE Main 2023 (Online) 10th April Evening Shift
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 dis...
JEE Main 2023 (Online) 10th April Morning Shift
$$\mathrm{FeO_4^{2 - }\buildrel { + 2.2V} \over \longrightarrow F{e^{3 + }}\buildrel { + 0.70V} \over \longrightarrow F{e^{2 + }}\buildrel { - 0.45V...
JEE Main 2023 (Online) 8th April Evening Shift
The number of incorrect statements from the following is ___________. A. The electrical work that a reaction can perform at constant pressure and temp...
JEE Main 2023 (Online) 6th April Evening Shift
The standard reduction potentials at $$298 \mathrm{~K}$$ for the following half cells are given below: $$\mathrm{NO}_{3}^{-}+4 \mathrm{H}^{+}+3 \mathr...
JEE Main 2023 (Online) 1st February Evening Shift
$$1 \times 10^{-5} ~\mathrm{M} ~\mathrm{AgNO}_{3}$$ is added to $$1 \mathrm{~L}$$ of saturated solution of $$\mathrm{AgBr}$$. The conductivity of this...
JEE Main 2023 (Online) 1st February Morning Shift
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)...
JEE Main 2023 (Online) 31st January Evening Shift
The resistivity of a $0.8 \mathrm{M}$ solution of an electrolyte is $5 \times 10^{-3} \Omega~ \mathrm{cm}$. Its molar conductivity is _________ $\tim...
JEE Main 2023 (Online) 31st January Morning Shift
The logarithm of equilibrium constant for the reaction $$\mathrm{Pd}^{2+}+4 \mathrm{Cl}^{-} \rightleftharpoons \mathrm{PdCl}_{4}^{2-}$$ is ___________...
JEE Main 2023 (Online) 30th January Evening Shift
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 \m...
JEE Main 2023 (Online) 30th January Morning Shift
Consider the cell $$\mathrm{Pt}_{(\mathrm{s})}\left|\mathrm{H}_{2}(\mathrm{~g}, 1 \mathrm{~atm})\right| \mathrm{H}^{+}(\mathrm{aq}, 1 \mathrm{M})|| \m...
JEE Main 2023 (Online) 29th January Evening Shift
The equilibrium constant for the reaction $$\mathrm{Zn(s)+Sn^{2+}(aq)}$$ $$\rightleftharpoons$$ $$\mathrm{Zn^{2+}(aq)+Sn(s)}$$ is $$1\times10^{20}$$ a...
JEE Main 2023 (Online) 29th January Morning Shift
Following figure shows dependence of molar conductance of two electrolytes on concentration. $$\Lambda \mathop m\limits^o $$ is the limiting molar con...
JEE Main 2023 (Online) 25th January Evening Shift
$$Pt(s)|{H_2}(g)(1\,bar)|{H^ + }(aq)(1\,M)||{M^{3 + }}(aq),{M^ + }(aq)|Pt(s)$$ The $$\mathrm{E_{cell}}$$ for the given cell is 0.1115 V at 298 K when ...
JEE Main 2023 (Online) 25th January Morning Shift
Consider the cell $$\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 +...
JEE Main 2023 (Online) 24th January Morning Shift
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 : $$\ma...
JEE Main 2022 (Online) 29th July Evening Shift
For a cell, $$\mathrm{Cu}(\mathrm{s})\left|\mathrm{Cu}^{2+}(0.001 \,\mathrm{M}) \| \mathrm{Ag}^{+}(0.01 \,\mathrm{M})\right| \mathrm{Ag}(\mathrm{s})$$...
JEE Main 2022 (Online) 29th July Morning Shift
Resistance of a conductivity cell (cell constant $$129 \mathrm{~m}^{-1}$$) filled with $$74.5 \,\mathrm{ppm}$$ solution of $$\mathrm{KCl}$$ is $$100 \...
JEE Main 2022 (Online) 26th July Morning Shift
The amount of charge in $$\mathrm{F}$$ (Faraday) required to obtain one mole of iron from $$\mathrm{Fe}_{3} \mathrm{O}_{4}$$ is ___________. (Nearest ...
JEE Main 2022 (Online) 25th July Evening Shift
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 negati...
JEE Main 2022 (Online) 25th July Morning Shift
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 ...
JEE Main 2022 (Online) 29th June Evening Shift
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 b...
JEE Main 2022 (Online) 29th June Morning Shift
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 gase...
JEE Main 2022 (Online) 28th June Evening Shift
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 $...
JEE Main 2022 (Online) 28th June Morning Shift
The quantity of electricity in Faraday needed to reduce 1 mol of Cr2O$$_7^{2 - }$$ to Cr3+ is ____________.
JEE Main 2022 (Online) 27th June Evening Shift
For the reaction taking place in the cell : Pt (s)| H2 (g)|H+(aq) || Ag+(aq) |Ag (s) E$$_{cell}^o$$ = + 0.5332 V. The value of $$\Delta$$fG$$^\circ$$ ...
JEE Main 2022 (Online) 27th June Morning Shift
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 m...
JEE Main 2022 (Online) 26th June Evening Shift
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....
JEE Main 2022 (Online) 25th June Evening Shift
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...
JEE Main 2022 (Online) 25th June Morning Shift
In a cell, the following reactions take place $$\matrix{ {F{e^{2 + }} \to F{e^{3 + }} + {e^ - }} & {E_{F{e^{3 + }}/F{e^{2 + }}}^o = 0.77\,V} \cr ...
JEE Main 2022 (Online) 24th June Evening Shift
The resistance of a conductivity cell containing 0.01 M KCl solution at 298 K is 1750 $$\Omega$$. If the conductivity of 0.01 M KCl solution at 298 K ...
JEE Main 2022 (Online) 24th June Morning Shift
The cell potential for the following cell Pt |H2(g)|H+ (aq)|| Cu2+ (0.01 M)|Cu(s) is 0.576 V at 298 K. The pH of the solution is __________. (Nearest ...
JEE Main 2021 (Online) 1st September Evening Shift
If the conductivity of mercury at 0$$^\circ$$C is 1.07 $$\times$$ 106 S m$$-$$1 and the resistance of a cell containing mercury is 0.243$$\Omega$$, th...
JEE Main 2021 (Online) 31st August Morning Shift
Consider the following cell reaction :$$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...
JEE Main 2021 (Online) 27th August Evening Shift
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 ...
JEE Main 2021 (Online) 26th August Evening Shift
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 : $$E_{C...
JEE Main 2021 (Online) 26th August Morning Shift
These are physical properties of an element(A) Sublimation enthalpy(B) Ionisation enthalpy(C) Hydration enthalpy(D) Electron gain enthalpyThe total nu...
JEE Main 2021 (Online) 27th July Evening Shift
For the cellCu(s) | Cu2+ (aq) (0.1 M) || Ag+(aq) (0.01 M) | Ag(s)the cell potential E1 = 0.3095 VFor the cellCu(s) | Cu2+ (aq) (0.01 M) || Ag+(aq) (0....
JEE Main 2021 (Online) 27th July Morning Shift
The conductivity of a weak acid HA of concentration 0.001 mol L$$-$$1 is 2.0 $$\times$$ 10$$-$$5 S cm$$-$$1. If $$\Lambda _m^o$$(HA) = 190 S cm2 mol$$...
JEE Main 2021 (Online) 25th July Morning Shift
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 poten...
JEE Main 2021 (Online) 22th July Evening Shift
Assume a cell with the following reaction$$C{u_{(s)}} + 2A{g^ + }(1 \times {10^{ - 3}}M) \to C{u^{2 + }}(0.250M) + 2A{g_{(s)}}$$$$E_{cell}^\Theta = 2...
JEE Main 2021 (Online) 20th July Evening Shift
Potassium chlorate is prepared by electrolysis of KCl in basic solution as shown by following equation.6OH$$-$$ + Cl$$-$$ $$\to$$ ClO3$$-$$ + 3H2O + 6...
JEE Main 2021 (Online) 18th March Evening Shift
The molar conductivities at infinite dilution of barium chloride, sulphuric acid and hydrochloric acid are 280, 860 and 426 S cm2 mol$$-$$1 respective...
JEE Main 2021 (Online) 18th March Morning Shift
For the reaction 2Fe3+(aq) + 2I$$-$$(aq) $$ \to $$ 2Fe2+(aq) + I2(s) the magnitude of the standard molar Gibbs free energy change, $$\Delta$$rG$$_m^o$...
JEE Main 2021 (Online) 17th March Evening Shift
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 solu...
JEE Main 2021 (Online) 16th March Evening Shift
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 conductivit...
JEE Main 2021 (Online) 26th February Evening Shift
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 neares...
JEE Main 2021 (Online) 26th February Morning Shift
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 Far...
JEE Main 2021 (Online) 25th February Evening Shift
Copper reduces NO$$_3^ - $$ into NO and NO2 depending upon the concentration of HNO3 in solution. (Assuming fixed [Cu2+] and PNO = PNO2), the HNO3 con...
JEE Main 2021 (Online) 24th February Evening Shift
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 decrease...
JEE Main 2020 (Online) 6th September Morning Slot
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 util...
JEE Main 2020 (Online) 5th September Morning Slot
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 __...
JEE Main 2020 (Online) 3rd September Evening Slot
An acidic solution of dichromate is electrolyzed for 8 minutes using 2A current. As per the following equation Cr2O72- + 14H+ + 6e– $$ \to $$ 2Cr3+ +...
JEE Main 2020 (Online) 3rd September Morning Slot
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) ...
JEE Main 2020 (Online) 2nd September Evening Slot
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 : ($...
JEE Main 2020 (Online) 2nd September Morning Slot
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); ($$E_{S{n^{2 + }...
JEE Main 2020 (Online) 9th January Morning Slot
108 g of silver (molar mass 108 g mol–1) is deposited at cathode from AgNO3(aq) solution by a certain quantity of electricity. The volume (in L) of ox...
JEE Main 2020 (Online) 8th January Evening Slot
For an electrochemical cell Sn(s) | Sn2+ (aq,1M)||Pb2+ (aq,1M)|Pb(s) the ratio $${{\left[ {S{n^{2 + }}} \right]} \over {\left[ {P{b^{2 + }}} \right]}}...
JEE Main 2020 (Online) 8th January Morning Slot
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...

MCQ (Single Correct Answer)

JEE Main 2024 (Online) 31st January Morning Shift
Identify the factor from the following that does not affect electrolytic conductance of a solution.
JEE Main 2024 (Online) 30th January Evening Shift
Alkaline oxidative fusion of $$\mathrm{MnO}_2$$ gives "A" which on electrolytic oxidation in alkaline solution produces B. A and B respectively are...
JEE Main 2024 (Online) 30th January Evening Shift
Reduction potential of ions are given below: $$\begin{array}{ccc} \mathrm{ClO}_4^{-} & \mathrm{IO}_4^{-} & \mathrm{BrO}_4^{-} \\ \mathrm{E}^{\circ}=1....
JEE Main 2024 (Online) 27th January Evening Shift
Which of the following statements is not correct about rusting of iron?
JEE Main 2023 (Online) 12th April Morning Shift
For lead storage battery pick the correct statements A. During charging of battery, $$\mathrm{PbSO}_{4}$$ on anode is converted into $$\mathrm{PbO}_{2...
JEE Main 2023 (Online) 8th April Morning Shift
The reaction $$\frac{1}{2} \mathrm{H}_{2}(\mathrm{~g})+\mathrm{AgCl}(\mathrm{s}) \rightleftharpoons \mathrm{H}^{+}(\mathrm{aq})+\mathrm{Cl}^{-}(\mathr...
JEE Main 2023 (Online) 6th April Morning Shift
The standard electrode potential of $$\mathrm{M}^{+} / \mathrm{M}$$ in aqueous solution does not depend on
JEE Main 2023 (Online) 1st February Evening Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A) : An aqueous solution of $$\ma...
JEE Main 2023 (Online) 31st January Morning Shift
Which one of the following statements is correct for electrolysis of brine solution?
JEE Main 2023 (Online) 29th January Morning Shift
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. Th...
JEE Main 2023 (Online) 24th January Evening Shift
Choose the correct representation of conductometric titration of benzoic acid vs sodium hydroxide.
JEE Main 2022 (Online) 28th July Morning Shift
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-f...
JEE Main 2022 (Online) 27th July Evening Shift
Given below are two statements : Statement I : For KI, molar conductivity increases steeply with dilution Statement II : For carbonic acid, molar cond...
JEE Main 2022 (Online) 25th July Evening Shift
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 identica...
JEE Main 2022 (Online) 30th June Morning Shift
In which of the following half cells, electrochemical reaction is pH dependent?
JEE Main 2022 (Online) 27th June Evening Shift
In 3d series, the metal having the highest M2+/M standard electrode potential is :
JEE Main 2022 (Online) 26th June Morning Shift
The $${\left( {{{\partial E} \over {\partial T}}} \right)_P}$$ of different types of half cells are as follows: .tg {border-collapse:collapse;border...
JEE Main 2022 (Online) 25th June Evening Shift
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 answe...
JEE Main 2021 (Online) 31st August Evening Shift
Match List - I with List - II List - I(Parmeter) List - II(Unit) (a) Cell constant (i) $$S\,c{m^2}mo{l^{...
JEE Main 2021 (Online) 26th August Morning Shift
Given below are two statements :Statement I : The limiting molar conductivity of KCl (strong electrolyte) is higher compared to that of CH3COOH (weak ...
JEE Main 2021 (Online) 26th February Morning Shift
Compound A used as a strong oxidizing agent is amphoteric in nature. It is the part of lead storage batteries. Compound A is :
JEE Main 2021 (Online) 24th February Morning Shift
The electrode potential of M2+/M of 3d-series elements shows positive value for :
JEE Main 2020 (Online) 6th September Evening Slot
For the given cell : Cu(s) | Cu2+(C1M) || Cu2+(C2M) | Cu(s) change in Gibbs energy ($$\Delta $$G) is negative, if :...
JEE Main 2020 (Online) 5th September Evening Slot
The variation of molar conductivity with concentration of an electrolyte (X) in aqueous solution is shown in the given figure. The electrolyte X is :...
JEE Main 2020 (Online) 4th September Evening Slot
250 mL of a waste solution obtained from the workshop of a goldsmith contains 0.1 M AgNO3 and 0.1 M AuCl. The solution was electrolyzed at 2V by passi...
JEE Main 2020 (Online) 4th September Morning Slot
$$E_{C{u^{2 + }}|Cu}^0$$ = +0.34 V $$E_{Z{n^{2 + }}|Zn}^0$$ = -0.76 V Identify the incorrect statement from the option below for the above cell :...
JEE Main 2020 (Online) 3rd September Morning Slot
Let CNaCl and CBaSO4 be the conductances (in S) measured for saturated aqueous solutions of NaCl and BaSO4, respectively, at a temperature T. Which o...
JEE Main 2020 (Online) 7th January Evening Slot
The equation that is incorrect is :
JEE Main 2020 (Online) 7th January Morning Slot
Given that the standard potentials (Eo) of Cu2+/Cu and Cu+/Cu are 0.34 V and 0.522 V respectively, the Eo of Cu2+/Cu+ : ...
JEE Main 2019 (Online) 12th April Morning Slot
Given CO3+ + e– $$ \to $$ CO2+ ; Eo = + 1.81 V Pb4+ + 2e– $$ \to $$ Pb2+ ; Eo = + 1.67 V Ce4+ + e– $$ \to $$ Ce3+ ; Eo = + 1.61 V Bi3+ + 3e– $$ \to...
JEE Main 2019 (Online) 10th April Evening Slot
Which one of the following graphs between molar conductivity ($${\Lambda _m}$$) versus $$\sqrt C $$ is correct ?
JEE Main 2019 (Online) 10th April Morning Slot
Consider the statements S1 and S2 S1 : Conductivity always increases with decrease in the concentration of electrolyte. S2 : Molar conductivity always...
JEE Main 2019 (Online) 9th April Evening Slot
A solution of Ni(NO3)2 is electrolysed between platinum electrodes using 0.1 Faraday electricity. How many mole of Ni will be deposited at the cathode...
JEE Main 2019 (Online) 9th April Morning Slot
The standard Gibbs energy for the given cell reaction in kJ mol–1 at 298 K is : Zn(s) + Cu2+ (aq) $$ \to $$ Zn2+ (aq) + Cu (s), E° = 2 V at 298 K (Far...
JEE Main 2019 (Online) 8th April Evening Slot
Calculate the standard cell potential in (V) of the cell in which following reaction takes place : Fe2+(aq) + Ag+(aq) $$ \to $$ Fe3+(aq) + Ag (s) Give...
JEE Main 2019 (Online) 8th April Morning Slot
Given that $${E^\Theta }_{{O_2}/{H_2}O} = 1.23\,V$$ ; $${E^\Theta }_{{S_2}O_8^{2 - }/SO_4^{2 - }} = 2.05\,V$$ $${E^\Theta }_{B{r_2}/B{r^ - }} = 1.09\,...
JEE Main 2019 (Online) 12th January Evening Slot
$$ \wedge _m^ \circ $$ for NaCl, HCl and NaA are 126.4, 425.9 and 100.5 S cm2 mol–1, respectively. If the conductivity of 0.001 M HA is- 5 $$ \times...
JEE Main 2019 (Online) 12th January Morning Slot
The standard electrode potential $${E^o }$$ and its temperature coefficient $$\left( {{{d{E^o }} \over {dT}}} \right)$$ for a cell are 2V and $$-$$ 5 ...
JEE Main 2019 (Online) 11th January Evening Slot
Given the equilibrium constant: KC of the reaction : Cu(s) + 2Ag+ (aq) $$ \to $$ Cu2+ (aq) + 2Ag(s) is 10 $$ \times $$ 1015, calculate the E$$_{cel...
JEE Main 2019 (Online) 11th January Morning Slot
For the cell Zn(s) |Zn2+ (aq)| |Mx+ (aq)| M(s), different half cells and their standard electrode potentials are given below : .tg {border-collapse...
JEE Main 2019 (Online) 10th January Evening Slot
In the cell Pt$$\left| {\left( s \right)} \right|$$H2(g, 1 bar)$$\left| {HCl\left( {aq} \right)} \right|$$AgCl$$\left| {\left( s \right)} \right|$$A...
JEE Main 2019 (Online) 10th January Morning Slot
Consider the following reduction processes : Zn2+ + 2e– $$ \to $$ Zn(s) ; Eo = – 0.76 V Ca2+ + 2e– $$ \to $$ Ca(s); Eo = –2.87 V Mg2+ + 2e– $$ \to $$ ...
JEE Main 2019 (Online) 9th January Evening Slot
If the standard electrode potential for a cell is 2 V at 300 K, the equilibrium constant (K) for the reaction Zn(s) + Cu2+ (aq) $$\rightleftharpoons$...
JEE Main 2019 (Online) 9th January Morning Slot
The anodic half-cell of lead-acid battery is recharged using electricity of 0.05 Faraday. The amount of PbSO4 electrolyzed in g during the process is ...
JEE Main 2018 (Online) 16th April Morning Slot
When 9.65 ampere current was passed for 1.0 hour into nitrobenzene in acidic medium, the amount of p-aminophenol produced is :
JEE Main 2018 (Offline)
How long (approximate) should water be electrolysed by passing through 100 amperes current so that the oxygen released can completely burn 27.66 g of ...
JEE Main 2018 (Online) 15th April Morning Slot
When an electric currents passed through acidified water, 112 mL of hydrogen gas at N.T.P. was collected at the cathode in 965 seconds. The current pa...
JEE Main 2017 (Online) 9th April Morning Slot
To find the standard potential of M3+/M electrode,the following cell is constituted : Pt/M/M3+(0.001 mol L−1 )/Ag+(0.01 mol L−1 )/Ag The emf of the c...
JEE Main 2017 (Online) 8th April Morning Slot
What is the standard reduction potential (Eo) for Fe3+ $$ \to $$ Fe ? Given that : Fe2+ + 2e$$-$$ $$ \to $$ Fe; $$E_{F{e^{2 + }}/Fe}^o$$ = $$-$$0.47 ...
JEE Main 2017 (Online) 8th April Morning Slot
Consider the following standard electrode potentials (Eo in volts) in aqueous solution : .tg {border-collapse:collapse;border-spacing:0;} .tg td{fon...
JEE Main 2017 (Offline)
Given $$E_{C{l_2}/C{l^ - }}^o$$ = 1.36 V, $$E_{C{r^{3 + }}/Cr}^o$$ = - 0.74 V $$E_{C{r_2}{O_7}^{2 - }/C{r^{3 + }}}^o$$ = 1.33 V, $$E_{Mn{O_4}^ - /Mn ^...
JEE Main 2016 (Online) 10th April Morning Slot
Oxidation of succinate ion produces ethylene and carbon dioxide gases. On passing 0.2 Faraday electricity through an aqueous solution of potassium suc...
JEE Main 2016 (Online) 10th April Morning Slot
Identify the correct statement :
JEE Main 2016 (Online) 9th April Morning Slot
What will occur if a block of copper metal is dropped into a beaker containing a solution of 1M ZnSO4?
JEE Main 2016 (Offline)
Galvanization is applying a coating of :
JEE Main 2015 (Offline)
Two Faraday of electricity is passed through a solution of CuSO4. The mass of copper deposited at the cathode is: (at. mass of Cu = 63.5 amu)...
JEE Main 2014 (Offline)
Resistance of 0.2 M solution of an electrolyte is 50 $$\Omega$$. The specific conductance of the solution is 1.4 S m-1. The resistance of 0.5 M soluti...
JEE Main 2014 (Offline)
Given below are the half-cell reactions: Mn2+ + 2e- $$\to$$ Mn; Eo = -1.18 V 2(Mn3+ + e- $$\to$$ Mn2+); Eo = +1.51 V The Eo for 3Mn2+ $$\to$$ Mn + 2Mn...
JEE Main 2014 (Offline)
The equivalent conductance of NaCl at concentration C and at infinite dilution are $${\lambda _C}$$ and $${\lambda _\infty }$$, respectively. The cor...
JEE Main 2013 (Offline)
Given $$E_{C{r^{2 + }}/Cr}^o$$ = -0.74 V; $$E_{MnO_4^ - /M{n^{2 + }}}^o$$ = 1.51 V $$E_{C{r_2}O_7^{2 - }/C{r^{3 + }}}^o$$ = 1.33 V; $$E_{Cl/C{l^ - }}^...
AIEEE 2012
The standard reduction potentials for Zn2+/ Zn, Ni2+/ Ni, and Fe2+/ Fe are –0.76, –0.23 and –0.44 V respectively. The reaction X + Y2+ $$\to$$ X2+ + Y...
AIEEE 2011
The reduction potential of hydrogen half cell will be negative if :
AIEEE 2010
The correct order of $$E_{{M^{2 + }}/M}^o$$ values with negative sign for the four successive elements Cr, Mn, Fe and Co is :
AIEEE 2010
The Gibbs energy for the decomposition of Al2O3 at 500oC is as follows : $${2 \over 3}A{l_2}{O_3}$$ $$\to$$ $${4 \over 3}Al + {O_2}$$, $${\Delta _r}G$...
AIEEE 2009
Given : $$E_{F{e^{3 + }}/Fe}^o$$ = -0.036V; $$E_{F{e^{2 + }}/Fe}^o$$ = -0.439 V The value of standard electrode potential for the change, Fe3+ (aq) ...
AIEEE 2009
In a fuel cell methanol is used as fuel and oxygen gas is used as an oxidizer. The reaction is CH3OH(l) + 3/2O2 $$\to$$ CO2 (g) + 2H2O (l) At 298K s...
AIEEE 2008
Given $$E_{C{r^{3 + }}/Cr}^o$$ = -0.72 V; $$E_{Fe^{2+}/Fe}^o$$ = -0.42V, The potential for the cell Cr | Cr3+ (0.1M) || Fe2+ (0.01 M) | Fe is...
AIEEE 2007
The equivalent conductances of two strong electrolytes at infinite dilution in H2O (where ions move freely through a solution) at 25oC are given below...
AIEEE 2007
The cell, Zn | Zn2+ (1M) || Cu2+ (1M) | Cu($$E_{cell}^o$$ = 1.10V) was allowed to be completely discharged at 298 K. The relative concentration of Zn...
AIEEE 2006
Given the data at 25oC, Ag + I- $$\to$$ AgI + e- , Eo = 0.152 V Ag $$\to$$ Ag+ + e-, Eo = -0.800 V What is the value of log Ksp for AgI? (2.303 RT/F ...
AIEEE 2006
The molar conductivities $$ \wedge _{NaOAc}^o$$ and $$ \wedge _{HCl}^o$$ and at infinite dilution in water at 25oC are 91.0 and 426.2 Scm2/mol respec...
AIEEE 2006
Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1 M is 100$$\Omega $$. The conductivity of this solution...
AIEEE 2005
For a spontaneous reaction the ∆G , equilibrium constant (K) and $$E_{cell}^o$$ will be respectively
AIEEE 2005
Aluminium oxide may be electrolysed at 1000oC to furnish aluminium metal (Atomic mass = 27 amu; 1 Faraday = 96,500 Coulombs). The cathode reaction is ...
AIEEE 2005
The highest electrical conductivity of the following aqueous solutions is of :
AIEEE 2005
.tg {border-collapse:collapse;border-spacing:0;} .tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-wid...
AIEEE 2004
In a hydrogen – oxygen fuel cell, combustion of hydrogen occurs to :
AIEEE 2004
Consider the following Eo values $$E_{F{e^{3 + }}/F{e^{2 + }}}^o$$ = 0.77 V; $$E_{S{n^{2 + }}/S{n}}^o$$ = -0.14 V Under standard conditions the poten...
AIEEE 2004
The standard e.m.f of a cell, involving one electron change is found to be 0.591 V at 25oC. The equilibrium constant of the reaction is (F = 96,500 C ...
AIEEE 2004
The limiting molar conductivities Λ° for NaCl, KBr and KCl are 126, 152 and 150 S cm2 mol-1 respectively. The Λ° for NaBr is
AIEEE 2004
In a cell that utilises the reaction Zn(s) + 2H+ (aq) $$\to$$ Zn2+(aq) + H2(g) addition of H2SO4 to cathode compartment, will ...
AIEEE 2004
The $$E_{{M^{3 + }}/{M^{2 + }}}^o$$ values for Cr, Mn, Fe and Co are – 0.41, +1.57, + 0.77 and +1.97 V respectively. For which one of these metals th...
AIEEE 2003
For a cell reaction involving a two-electron change, the standard e.m.f. of the cell is found to be 0.295 V at 25oC. The equilibrium constant of the r...
AIEEE 2003
Standard reduction electrode potentials of three metals A,B&C are respectively +0.5 V, -3.0 V & -1.2 V. The reducing, powers of these metals a...
AIEEE 2003
When during electrolysis of a solution of AgNO3, 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposited on the cat...
AIEEE 2003
For the redox reaction Zn(s) + Cu2+(0.1 M) $$\to$$ Zn2+(1M) + Cu(s) taking place in a cell, $$E_{cell}^o$$ is 1.10 volt. Ecell for the cell will be (...
AIEEE 2003
Several blocks of magnesium are fixed to the bottom of a ship to :
AIEEE 2002
Conductivity (Seimen’s S) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to ...
AIEEE 2002
For the following cell with hydrogen electrodes at two different pressure p1 and p2. What will be the emf for the given cell : $$\eqalign{ & Pt(...
AIEEE 2002
EMF of a cell in terms of reduction potential of its left and right electrodes is :
AIEEE 2002
Which of the following reaction is possible at anode?
AIEEE 2002
When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are :
AIEEE 2002
For a cell given below $$ \begin{aligned} \mathrm{Ag}^{+}+\mathrm{e}^{-} & \longrightarrow \mathrm{Ag}; E^{\circ}=x \\\\ \mathrm{Cu}^{2+}+2 e^{-}...
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12