Electrochemistry

Electrochemistry

These MCQs are intended for checking your Chemistry subject, Chapter Electrochemistry knowledge.

The specific conductivity of a saturated solution of AgCl is 3.40 × 10-6 ohm-1cm-1 at 25 ºC. If  λAg+ = 62.3 ohm-1cm2 mol-1 & λcl = 67.7 ohm-1cm2 mol-1, the solubility of AgCl at 25º C is :

The equivalent conductivity of 0.1 N CH3COOH at 25°C is 80 and at infinite dilution 400. The degree of dissociation of CH3COOH is :

Resistance of 0.1 M KCl solution in a conductance cell is 300 ohm and conductivity is 0.013 Scm-1. The value of cell constant is :

The specific conductance of a N/10 KCl at 25°C is 0.0112 ohm-1 cm-1. The resistance of cell containing solution at the same temperature was found to be 55 ohms. The cell constant will be

The ionization constant of a weak electrolyte is 25 × 10-6 while the equivalent conductance of its 0.01 M solution is 19.6 S cm2       eq-1. The equivalent conductance of the electrolyte at infinite dilution (in S cm2 eq-1 ) will be

The molar conductance at infinite dilution of AgNO3, AgCl and NaCl are 116.5, 121.6 and 110.3 respectively. The molar conductances of NaNO3 is :

If the specific resistance of a solution of concentration C g equivalent litre-1 is R, then its equivalent conductance is :

The specific conductance of a 0.01 M solution of KCl is 0.0014 ohm-1 cm-1 at 25°C, Its equivalent conductance
(cm2 ohm-1 equiv-1 M) is :

The equivalent conductance of 32 M 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 :

The value of λm for NH4Cl, NaOH and NaCl are 129.8, 248.1 and 126.4 ohm-1 cm2 mol-1 respectively.
Calculate λm for NH4OH solution (in ohm-1 cm2 mol-1)

The specific conductance of a salt of 0.01 M concentration is 1.061 × 10-4 molar conductance of the same solution will be :

At infinite dilution, the eq. conductannces of CH3COONa, HCl and CH3COOH are 91, 426 and 391 mho cm2 respectively at 25°C, The eq. conductance of NaCl at infinite dilution will be :

Molar conductivities (Λºm) at infinite dilution of NaCl, HCl and CH3COONa are 126.4, 425.9 and 91.0 S cm2 mol-1 respectIvely. Λºm for CH3COOH will be :

Which of the following solutions of NaCl will have the highest specific condutance ?

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