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Chapter 16: Problem 8
When a strong acid is titrated against a strong base, the end point is the point of (a) zero conductance (b) maximum conductance (c) minimum conductance (d) none of these.
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On passing electrical current through an electrolyte solution, the cations (a) move towards cathode with speed equal to that of anions towards anode (b) move with faster speed than that of anions (c) move with different speed as compared to that of anions (d) move with slower speed than that of anions
The failure of Ostwald's dilution law in case of strong electrolytes is due to (a) strong electrolytes are almost completely dissociated at all dilutions and \(\lambda_{v} / \lambda_{\infty}\) do not give accurate value of \(a\) (b) the law of mass action in its simple form cannot be applied when the concentration of the ions is very high (c) the ions get hydrolysed and affect the concentration terms (d) all of the above
Which of the following statement is true? (a) Ostwald's dilution law holds good only for strong electrolytes and fails completely when applied to weak electrolytes. (b) Ostwald's dilution law holds good for both weak and strong electrolytes. (c) Ostwald's dilution law holds good only for weak electrolytes and fails completely when applied to strong electrolytes. (d) Ostwald's dilution law does not good hold good for both weak and strong electrolytes.
The equivalent conductance at infinite dilution of \(\mathrm{NaCl}\), \(\mathrm{HCl}\) and \(\mathrm{CH}_{3} \mathrm{COONa}\) at \(25^{\circ} \mathrm{C}\) are \(126.0\), \(426.0\) and \(91.0 \mathrm{ohm}^{-1} \mathrm{~cm}^{2}\) respectively. The equivalent conductance of acetic acid at infinite dilution at \(25^{\circ} \mathrm{C}\) will be (a) \(643.0\) (b) \(517.0\) (c) \(217.0\) (d) \(391.0\)
The Hittorf's rule states that (a) the loss of concentration around any electrode is proportional to the speed of the ions moving towards it (b) the loss of concentration around any electrode is proportional to the speed of the ions moving away from it (c) the loss of concentrations around both the electrodes is proportional to the sum of speed of cations and anions (d) none of the above
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