JEE Mains · Chemistry · STD 12 - 2. Electrochemistry
Calculate the standard cell potential (in \(V\)) of the cell in which following reaction takes place \(F{e^2}+ \left( {aq} \right) + A{g^ + }\left( {aq} \right) \to F{e^{3 + }}\left( {aq} \right) + Ag\left( s \right)\) Given that:
\(E_{Ag^+/Ag}^o = xV\)
\(E_{F{e^{2 + }}/Fe}^o = yV\)
\(E_{F{e^{3 + }}/Fe}^o = zV\)
- A \(x -z\)
- B \(x + y -z\)
- C \(x -y\)
- D \(x + 2y -3z\)
Answer & Solution
Correct Answer
(D) \(x + 2y -3z\)
Step-by-step Solution
Detailed explanation
\(F{{e}^{2+}}(aq)\,+\,A{{g}^{+}}(aq)\,\to \,F{{e}^{3+}}\,(aq)\,+\,Ag\,(s)\) \(E_{cell}^o\, = \,3\) Given : \(E_{A{g^ + }/Ag}^o\, = \,x\) ....... \((1)\) \(E_{F{e^{2 + }}/Fe}^o\, = \,y\) ....... \((2)\) \(E_{F{e^{3 + }}/Fe}^o\, = \,Z\) ....... \((3)\) Using equation:…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- The following data was obtained for chemical reaction given below at \(975\, \mathrm{~K}\). \(2 \mathrm{NO}_{(\mathrm{g})}+2 \mathrm{H}_{2(\mathrm{~g})} \rightarrow \mathrm{N}_{2(\mathrm{~g})}+2 \mathrm{H}_{2} \mathrm{O}_{(\mathrm{g})}\)
The order of the reaction with respect to \(\mathrm{NO}\) is ..... .\([NO]\) \(\mathrm{mol} \mathrm{L}^{-1}\) \({H}_{2}\) \(\mathrm{mol} \mathrm{L}^{-1}\) Rate \(\mathrm{mol}L^{-1}\) \(s^{-1}\) \((A)\) \(8 \times 10^{-5}\) \(8 \times 10^{-5}\) \(7 \times 10^{-9}\) \((B)\) \(24 \times 10^{-5}\) \(8 \times 10^{-5}\) \(2.1 \times 10^{-8}\) \((C)\) \(24 \times 10^{-5}\) \(32 \times 10^{-5}\) \(8.4 \times 10^{-8}\) JEE Mains 2021 Medium - From the given following \(( A\) to D \()\) cyclac structures, those which will not react with Tollen's reagent are :
JEE Mains 2026 Medium - The correct decreasing order of spin only magnetic moment values \((\mathrm{BM})\) of \(\mathrm{Cu}^{+}, \mathrm{Cu}^{2+}, \mathrm{Cr}^{2+}\) and \(\mathrm{Cr}^{3+}\) ions is which?JEE Mains 2025 Medium
- The correct statements from following are: \(A\). The strength of anionic ligands can be explained by crystal field theory. \(B\). Valence bond theory does not give a quantitative interpretation of kinetic stability of coordination compounds. \(C\). The hybridization involved in formation of \(\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}\) complex is \(\mathrm{dsp}^2\). \(D\). The number of possible isomer\((s)\) of cis- \(\left[\mathrm{PtCl}_2(\text { en })_2\right]^{2+}\) is one Choose the correct answer from the options given below:JEE Mains 2024 Hard
- The ionization energy of sodium in \(\mathrm{kJ} \mathrm{mol}^{-1}\). If electromagnetic radiation of wavelength \(242 \mathrm{~nm}\) is just sufficient to ionize sodium atom is _______.JEE Mains 2024 Hard
- The elements with atomic numbers \(101\) and \(104\) belong to, respectivelyJEE Mains 2020 Medium
More PYQs from JEE Mains
- Consider the differential equation \({y^2}dx + \left( {x - \frac{1}{y}} \right)dy = 0\) . If value of \(y\) is \(1\) when \(x = 1\), then the value of \(x\) for which \(y = 2\), isJEE Mains 2019 Hard
- The space between the plates of a parallel plate capacitor is filled with a 'dielectric' whose 'dielectric constant' varies with distance as per the relation: \(K(x) = K_0 + \lambda x\) ( \(\lambda =\) constant) The capacitance \(C,\) of the capacitor, would be related to its vacuum capacitance \(C_0\) for the relationJEE Mains 2014 Hard
- Match the thermodynamic processes taking place in a system with the correct conditions. In the table: \(\Delta Q\) is the heat supplied, \(\Delta W\) is the work done and \(\Delta U\) is change in internal energy of the system
Process Condition \((I)\) Adiabatic \((A)\; \Delta W =0\) \((II)\) Isothermal \((B)\; \Delta Q=0\) \((III)\) Isochoric \((C)\; \Delta U \neq 0, \Delta W \neq 0 \Delta Q \neq 0\) \((IV)\) Isobaric \((D)\; \Delta U =0\) JEE Mains 2020 Medium - Addition of sodium hydroxide solution to a weak acid \((HA)\) results in a buffer of \(pH\, 6\). lf ionisation constant of \(HA\) is \(10^{-5}\) , the ratio of salt to acid concentration in the buffer solution will beJEE Mains 2017 Medium
- Suppose two planets (spherical in shape) of radii \({R}\) and \(2 {R}\), but mass \({M}\) and \(9\, {M}\) respectively have a centre to centre separation \(8\, {R}\) as shown in the figure. A satellite of mass \('{m}'\) is projected from the surface of the planet of mass \('M'\) directly towards the centre of the second planet. The minimum speed \('v'\) required for the satellite to reach the surface of the second planets is \(\sqrt{\frac{a}{7} \frac{G M}{R}}\) then the value of \('a'\) is \(....\) [Given: The two planets are fixed in their position]
JEE Mains 2021 Hard - Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion-(A) : If Young's double slit experiment is performed in an optically denser medium than air, then the consecutive fringes come closer.
Reason-(R) : The speed of light reduces in an optically denser medium than air while its frequency does not change.
In the light of the above statements, choose the most appropriate answer from the options given below :JEE Mains 2025 Easy