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Test: Conductivity of Solutions - NEET MCQ


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10 Questions MCQ Test Chemistry Class 12 - Test: Conductivity of Solutions

Test: Conductivity of Solutions for NEET 2024 is part of Chemistry Class 12 preparation. The Test: Conductivity of Solutions questions and answers have been prepared according to the NEET exam syllabus.The Test: Conductivity of Solutions MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Conductivity of Solutions below.
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Test: Conductivity of Solutions - Question 1

Molar conductivity of solution is represented by:

Detailed Solution for Test: Conductivity of Solutions - Question 1

Molar conductivity of a solution is the conductivity of that volume containing 1 mole of an electrolyte when placed between two sufficiently large electrodes, which are 1 cm. apart. It is represented by Λm.

Test: Conductivity of Solutions - Question 2

According to the conductivity, pick the odd one out from the following:

Detailed Solution for Test: Conductivity of Solutions - Question 2

The correct answer is Option B.

Glass is an insulator while others are conductors.
 

Test: Conductivity of Solutions - Question 3

Which of the following statements is incorrect about cell constant?

Detailed Solution for Test: Conductivity of Solutions - Question 3

The correct answer is Option C.
Cell constant can be defined as the ratio of the distance between conductance-titration electrodes to the area of the electrodes, measured from the determined resistance of a solution of known specific conductance. It has dimension length-1

Test: Conductivity of Solutions - Question 4

The inverse of resistance is called:

Detailed Solution for Test: Conductivity of Solutions - Question 4

The correct answer is option D
The inverse quantity is electrical conductance, and is the ease with which an electric current passes. The SI unit of electrical resistance is the ohm (Ω), while electrical conductance is measured in siemens (S).
 

Test: Conductivity of Solutions - Question 5

The inverse of conductivity is called:

Detailed Solution for Test: Conductivity of Solutions - Question 5

The correct answer is option D
Electrical resistivity (also called specific electrical resistance or volume resistivity) and its inverse, electrical conductivity, is a fundamental property of a material that quantifies how strongly it resists or conducts electric current. ... The SI unit of electrical resistivity is the ohm-meter (Ω⋅m).
 

Test: Conductivity of Solutions - Question 6

Conductivity is represented by the symbol

Detailed Solution for Test: Conductivity of Solutions - Question 6

The correct answer is Option D.

It is commonly signified by the Greek letter σ (sigma), but κ (kappa) (especially in electrical engineering) and γ (gamma) are sometimes used.
 

Test: Conductivity of Solutions - Question 7

The internationally recommended unit for conductance is

Detailed Solution for Test: Conductivity of Solutions - Question 7

The internationally recommended unit for conductance is Siemens (S). 1 siemen = 1 ohm-1

Test: Conductivity of Solutions - Question 8

The cell constant G* is calculated by the expression:

Detailed Solution for Test: Conductivity of Solutions - Question 8

The quantity l/A is called cell constant denoted by the symbol, G*.It depends on the distance between the electrodes and their area of cross-section and has the dimension of length–1 and can be calculated if we know l and A. Measurement of l and A is not only inconvenient but also unreliable. The cell constant is usually determined by measuring the resistance of the cell containing a solution whose conductivity is already known. For this purpose, we generally use KCl solutions whose conductivity is known accurately at various concentrations and at different temperatures. The cell constant, G*, is then given by the equation:
G* =l/A= Rκ

Test: Conductivity of Solutions - Question 9

 Which of the following relations are not correct?

Detailed Solution for Test: Conductivity of Solutions - Question 9

The correct answer is Option B 
 
k =G*l/A      (Since, G = 1/R)
   = l/AR 
Therefore, kR = l/A 
So, l/A = kR not k/R

Test: Conductivity of Solutions - Question 10

The ionic conductivity of the cation and anion of the uni-univalent salt is 140 and 80 ohm-1 cm2 mol-1 respectively. The molar conductivity of the salt is:

Detailed Solution for Test: Conductivity of Solutions - Question 10

The correct answer is option D
The molar conductivity of uni-univalent electrolyte like AB = sum of their ionic conductivities = 140 + 80 = 220 ohm-1 cm2 mol-1
 

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