JEE Main Redox & Electrochemistry — practice questions
58 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice JEE Main Redox & Electrochemistry in the app →A student says, "Since the Zn rod becomes negatively charged, it cannot be the site of oxidation." Which optioBased on the figure, which label is most consistent with the process occurring at the Zn rod?
 \,||\, \mathrm{Cu}^{2+}(aq) | \mathrm{Cu}$, the standarThe role of a salt bridge in a galvanic cell is to:The standard reduction potential of the standard hydrogen electrode (SHE) is assigned the value:For a cell reaction with standard cell potential $E^\circ_\text{cell} = +1.10\,\text{V}$ and $n = 2$ electronsThe Nernst equation for a cell reaction at $298\,\text{K}$ with $n$ electrons exchanged is:For a cell reaction with $E^\circ_\text{cell} = +0.59\,\text{V}$ and $n = 2$, the equilibrium constant $K$ at Molar conductivity $\Lambda_m$ of an electrolytic solution is related to its conductivity $\kappa$ and molar cOn dilution, the molar conductivity of a strong electrolyte solution:Kohlrausch's law of independent migration of ions states that:A current of $0.5\,\text{A}$ is passed through an aqueous $\mathrm{CuSO_4}$ solution for $32\,\text{minutes}\,Which of the following is classified as a secondary (rechargeable) cell?The degree of dissociation $\alpha$ of a weak electrolyte at a given concentration is related to its molar conIn a Daniell cell with Zn (anode) and Cu (cathode), and $E^\circ(Cu^{2+}/Cu) = +0.34$ V, $E^\circ(Zn^{2+}/Zn) The Nernst equation at $25^\circ$C for a cell with $n$ electrons transferred is $E = E^\circ -$:Electrolysis of molten NaCl at the electrode passes $1$ F of charge. The amount of Na deposited at the cathodeIron rusting on the village ploughshare is best described as:Originally, oxidation described the addition of which element?Dioxygen makes up roughly what share of the atmosphere?Elements commonly occur on earth as their oxides chiefly because of:Burning magnesium in oxygen is an example of the element being:Burning sulphur in oxygen counts as oxidation because oxygen is:Methane burning in oxygen is oxidised owing to the addition of:Looking at methane's combustion, chemists reinterpreted oxidation as removal of:The early definition of oxidation by oxygen addition is described as:Redox reactions are described in terms of the transfer of:The modern view treats oxidation and reduction as reactions of:Oxidation number denotes the oxidation state of an element in a:Oxidation numbers are assigned according to a set of:Disproportionation reactions are a special type of:In disproportionation, one element in one oxidation state is simultaneously oxidised and:A substance undergoing disproportionation must contain an element with at least how many oxidation states?In disproportionation, the element in the reacting substance is in a state that is:Redox reactions are involved in phenomena that are physical and also:Magnesium and sulphur burning in oxygen illustrate oxidation by the definition that is:Which is a redox reaction according to the electron transfer view?The classical definition of oxidation looked at oxygen and:Oxidation number and oxidation state are terms that are:Reduction, in the classical sense, is the reverse of: