Molar Conductivities and their Variation with Concentration NEET Questions

Physical Chemistry - Redox Reactions and Electrochemistry
Molar Conductivities and their Variation with Concentration

Molar Conductivities and their Variation with Concentration MCQ Questions


1.
The SI unit of molar conductivity (Λm) is:
A.
Ω cm² mol⁻¹
B.
S cm⁻¹
C.
S m⁻¹ mol
D.
S m² mol⁻¹
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ANSWER :
D. S m² mol⁻¹
2.
Molar conductivity of an electrolyte solution is defined as:
A.
Resistance offered by one mole of electrolyte
B.
Conductance of 1 cm³ of solution
C.
Conductivity per unit volume of solution
D.
Conductivity of a solution containing one mole of electrolyte between electrodes 1 unit apart
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ANSWER :
D. Conductivity of a solution containing one mole of electrolyte between electrodes 1 unit apart
3.
The relationship between molar conductivity (Λm), conductivity (κ) and molar concentration (c) is:
A.
Λm = κ + c
B.
Λm = c/κ
C.
Λm = κ/c
D.
Λm = κ × c
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ANSWER :
C. Λm = κ/c
4.
If conductivity κ is in S cm⁻¹ and concentration c is in mol L⁻¹, then molar conductivity in S cm² mol⁻¹ is given by:
A.
Λm = κ/c
B.
Λm = κ/(1000c)
C.
Λm = 100κ/c
D.
Λm = 1000κ/c
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ANSWER :
D. Λm = 1000κ/c
5.
The unit of conductivity (specific conductance) κ in SI system is:
A.
S m² mol⁻¹
B.
S cm² mol⁻¹
C.
Ω m
D.
S m⁻¹
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ANSWER :
D. S m⁻¹
6.
On dilution, the molar conductivity of an electrolyte:
A.
Remains constant
B.
Decreases
C.
Increases
D.
First decreases then increases
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ANSWER :
C. Increases
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