Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Electrochemistry question

2003 · Q100
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Chemistry
  4. /Electrochemistry
  5. /2003 · Q100

Electrochemistry question

2003 · Q100

NEETChemistryElectrochemistryMCQ+4 / −1
The e.m.f. of a Daniell cell at 298 K is E1.
AIPMT 2003 Chemistry - Electrochemistry Question 27 English
When the concentration of ZnSO4 is 1.0 M and that of CuSO4 is 0.01 M, the e.m.f. changed to E2. What is the relationship between E1 and E2?
  1. A
    E1 > E2
  2. B
    E1 < E2
  3. C
    E1 = E2
  4. D
    E2 = 0 ≠\ne= E1
View written solutionFree

Correct answer: A

Cell reaction is,

Zn + Cu2+ →\to→ Zn2+ + Cu

Ecell = Eocell - RTnFln⁡[Zn2+][Cu2+]{{RT} \over {nF}}\ln {{\left[ {Z{n^{2 + }}} \right]} \over {\left[ {C{u^{2 + }}} \right]}}nFRT​ln[Cu2+][Zn2+]​

Greater the factor [Zn2+][Cu2+]{{\left[ {Z{n^{2 + }}} \right]} \over {\left[ {C{u^{2 + }}} \right]}}[Cu2+][Zn2+]​, less is the EMF.

Hence E1 > E2

PreviousNext

More from Electrochemistry

  • On the basis of the information available from the reaction, 4/3Al + O2 → 2/3Al2O3, ΔG = − 827 kJ mol−1 of O2, the minimum e.m.f. required to carry out an electrolysis of Al2O3 is (F = 96500 C mol−1)2003 · MCQ
  • In electrolysis of NaCl when Pt electrode is taken then H2 is liberated at cathode while with Hg cathode it forms sodium amalgam2002 · MCQ
  • Standard electrode potentials are Fe2+/Fe [Eo = −0.44] and Fe3+/Fe2+[ Eo = 0.77]; If Fe2+, Fe3+ and Fe blocks are kept together, then2001 · MCQ
  • Cell reaction is spontaneous when2000 · MCQ
  • Equivalent conductances of Ba2+ and Cl− ions are 127 and 76 ohm−1 cm−1 eq−1 respectively. Equivalent conductance of BaCl2 at infinite dilution is2000 · MCQ
  • For the disproportionation of copper 2Cu+ → Cu2+ + Cu, Eo is (Given Eo for Cu2+/Cu is 0.34 V and Eo for Cu2+/Cu+ is 0.15 V.)2000 · MCQ
  • Match List I with List II. Choose the correct answer from the options given below : Includes table2024 · MCQ
  • Mass in grams of copper deposited by passing 9.6487 A current through a voltmeter containing copper sulphate solution for 100 seconds is (Given : Molar mass of Cu:63 g mol−1,1 F=96487C…2024 · MCQ