Molar Conductivities and their Variation with Concentration NEET Questions

Physical Chemistry - Redox Reactions and Electrochemistry

Molar Conductivities and their Variation with Concentration MCQ Questions


13.
Molar conductivity at infinite dilution is represented as
A.
Λ₀
B.
Λm
C.
Λ∞
D.
Λmax
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ANSWER :
C. Λ∞
14.
Which electrolyte shows the lowest Λm at infinite dilution?
A.
HCl
B.
CH₃COOH
C.
NaOH
D.
KOH
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ANSWER :
B. CH₃COOH
15.
Which pair of ions contributes most to Λm⁰?
A.
Na⁺ and Cl⁻
B.
H⁺ and OH⁻
C.
K⁺ and NO₃⁻
D.
Ca²⁺ and Cl⁻
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ANSWER :
B. H⁺ and OH⁻
16.
Conductivity decreases with dilution because
A.
Number of ions decreases
B.
Viscosity increases
C.
Molar mass increases
D.
Resistance increases
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ANSWER :
A. Number of ions decreases
17.
Which of the following has highest conductivity?
A.
0.01 M NaCl
B.
0.1 M NaCl
C.
1 M NaCl
D.
0.001 M NaCl
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ANSWER :
C. 1 M NaCl
18.
Λm = κ × 1000 / c. If c = 0.01 mol/L, κ = 0.005 S/cm, then Λm = ?
A.
500 S cm²/mol
B.
50 S cm²/mol
C.
5 S cm²/mol
D.
0.5 S cm²/mol
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ANSWER :
A. 500 S cm²/mol