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

2009 · Q98
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. /2009 · Q98

Electrochemistry question

2009 · Q98

NEETChemistryElectrochemistryMCQ+4 / −1
The equivalent conductance of M/32 solution of a weak monobasic acid is 8.0 mho cm2 and at infinite dilution is 400 mho cm2. The dissociation constant of this acid is
  1. A
    1.25 ×\times× 10−-−6
  2. B
    6.25 ×\times× 10−-−4
  3. C
    1.25 ×\times× 10−-−4
  4. D
    1.25 ×\times× 10−-−5
View written solutionFree

Correct answer: D

The degree of dissociation (α\alpha α)

α\alpha α = 8400{8 \over {400}}4008​ = 2 ×\times× 10-2

From Ostwald’s dilution law for weak monobasic acid, we have

kc = Cα\alpha α2

= 132×(2×10−2)2{1 \over {32}} \times {\left( {2 \times {{10}^{ - 2}}} \right)^2}321​×(2×10−2)2

= 1.25 ×\times× 10-5

PreviousNext

More from Electrochemistry

  • On the basis of the following Eo values, the strongest oxidizing agent is [Fe(CN)6]4− → [Fe(CN)6]3− + e−; Eo = −0.35 V Fe2+ → Fe3+ + e−; Eo = −0.77 V2008 · MCQ
  • Kohlrausch's law states that at2008 · MCQ
  • Standard free energies of formation (in kJ/mol) at 298 K are −237.2, − 394.4 and −8.2 for H2O(l), CO2(g) and pentane (g) respectively. The value of Eocell for the pentane-oxygen fuel cell is2008 · MCQ
  • The equilibrium constant of the reaction: Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s); Eo = 0.46 V at 298 K is2007 · MCQ
  • The efficiency of a fuel cell is given by2007 · MCQ
  • EoFe2+/Fe = − 0.441 V and EoFe3+/Fe2+ = 0.771 V, the standard EMF of the reaction Fe + 2Fe3+ → 3Fe2+ will be2006 · MCQ
  • A hypothetical electrochemical cell is shown below. A∣A+(xM)∣∣B+(yM)∣B The emf measured is + 0.20 V. The cell reaction is2006 · MCQ
  • 4.5 g of aluminium (at. mass 27 amu) is deposited at cathode from Al3+ solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from H ions in solution by the same quantity of electric charge will be2005 · MCQ