The conductivity of centimolar solution of KCl at 25°C is 0.0210 ohm-1 cm-1 and the resistance of the cell containing the solution at 25°C is 60 ohm. The value of cell constant is- 
1. 3.34  cm-1 2. 1.34  cm-1
3. 3.28  cm-1 4. 1.26  cm-1
Subtopic:  Conductance & Conductivity |
 74%
From NCERT
NEET - 2023
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The molar conductance of an electrolyte increases with dilution according to the equation: 
\(\Lambda_{\mathrm{m}}=\Lambda_{\mathrm{m}}^{\circ}-\mathrm{A} \sqrt{\mathrm{c}} \)
Consider the following four statements:
A: This equation applies to both strong and weak electrolytes.
B: The value of the constant A depends upon the nature of the solvent. 
C: The value of constant A is the same for both \(BaCl_2\) and \(MgSO_4\)
D: The value of constant A is the same for both \(BaCl_2\) and \(Mg(OH)_2\)
Which of the above statements are correct? 
1. (A) and (B) only 
2. (A), (B), and (C) only 
3. (B) and (C) only 
4. (B) and (D) only 
Subtopic:  Conductance & Conductivity |
 53%
From NCERT
NEET - 2023
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\(\land^o_m\) for NaCl, HCl and \(CH_3COONa \) are 126.4, 425.9, and 91.05 S cm2 mol-1 respectively. If the conductivity of 0.001028 mol L-1 acetic acid solution is \(4.95 \times 10^{-5} S ~cm^{-1} \), the degree of dissociation of the acetic acid solution is-

1. 0.01233 2. 1.00 
3. 0.1233  4. 1.233
Subtopic:  Conductance & Conductivity |
 56%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
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Limiting molar conductivities, for the given solutions, are :

λm0(H2SO4)x cm2 mol-1

λm0(K2SO4)y cm2 mol-1

λm0(CH3COOK)z cm2 mol-1

From the data given above, it can be concluded that \(\lambda_m^0 \) in (\(S\ cm^2\ mol^{-1}\)) for CH3COOH will be :

1. \(\mathrm{x-y+2z}\)        2. \(\mathrm{x+y+z}\)          
3. \(\mathrm{x-y+z}\)        4. \(\mathrm{{(x-y) \over 2}+z}\)          
Subtopic:  Conductance & Conductivity |
 69%
From NCERT
NEET - 2019
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NEET 2023 - Target Batch - Aryan Raj Singh
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