Test: Conductance- 2


30 Questions MCQ Test Physical Chemistry | Test: Conductance- 2


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This mock test of Test: Conductance- 2 for Chemistry helps you for every Chemistry entrance exam. This contains 30 Multiple Choice Questions for Chemistry Test: Conductance- 2 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Conductance- 2 quiz give you a good mix of easy questions and tough questions. Chemistry students definitely take this Test: Conductance- 2 exercise for a better result in the exam. You can find other Test: Conductance- 2 extra questions, long questions & short questions for Chemistry on EduRev as well by searching above.
*Multiple options can be correct
QUESTION: 1

Which of the following options are correct:

Solution:
*Multiple options can be correct
QUESTION: 2

The correct expressions between conc. mobility and molar conductivity are:

Solution:
*Multiple options can be correct
QUESTION: 3

Which of the following are correct:

Solution:
*Multiple options can be correct
QUESTION: 4

Which of the following expressions are correct:

Solution:
*Multiple options can be correct
QUESTION: 5

Which of the following plots are correct:

Solution:
*Multiple options can be correct
QUESTION: 6

The correct expressions of molar conductivity are:

Solution:
*Multiple options can be correct
QUESTION: 7

The correct expressions for dissociation constant of weak acid are:

Solution:
*Multiple options can be correct
QUESTION: 8

The correct expressions which explain the Debye-Huckel-Onsager Theory for strong electrolytes are

Solution:
*Multiple options can be correct
QUESTION: 9

The correct order of molar conductivities at infinite dilution are:

Solution:
*Multiple options can be correct
QUESTION: 10

The correct expressions for equivalent conductance are:

Solution:

G is conductance and l is length.

We know that https://cdn3.edurev.in/ApplicationImages/Temp/484395_163c4df7-86d5-4852-91f7-5a3c65e74cb9_lg.PNG

Now, G(conductance) = KA/l => K = Gl/A and Veq = Al

So, https://cdn3.edurev.in/ApplicationImages/Temp/484395_163c4df7-86d5-4852-91f7-5a3c65e74cb9_lg.PNG(Gl/A)(Al) = Gl2 

Hence A and B are correct.

*Multiple options can be correct
QUESTION: 11

Choose the correct statements:

Solution:
*Multiple options can be correct
QUESTION: 12

Choose the correct options:

Solution:
*Multiple options can be correct
QUESTION: 13

Which of the following will have same value of molar conductivity and equivalent conductivity:

Solution:
*Multiple options can be correct
QUESTION: 14

If   = 73.5Ω-1cm2 mol-1  = 189Ω-1cm2 mol-1 and  = 160Ω-1cm2 mol-1 then:

Solution:

Potash alum is K2SO4 · Al2(SO4)3 · 24H2O
On dilutionsions will be 2K+, 2Al3+ and 4SO42–

*Multiple options can be correct
QUESTION: 15

The unit of conductance is (are):

Solution:
*Multiple options can be correct
QUESTION: 16

The unit of conductivity is(are):

Solution:

A and C are correct.

R = ρ l/A

ρ = RA/l

Units of ρ = Ω cm

σ = 1/ρ

Units of σ = Ω-1 cm-1 

Ω-1 = S (Siemens)

Units of σ = S cm-1

QUESTION: 17

Choose the correct order of molar ionic conductivities of the following ions.

Solution:
*Multiple options can be correct
QUESTION: 18

For which of the following  relation is correct:

Solution:

*Multiple options can be correct
QUESTION: 19

Choose the correct statements:

Solution:
QUESTION: 20

On dilution, the:

Solution:
*Answer can only contain numeric values
QUESTION: 21

The equivalent conductance of 0.01 M solution of K2SO4 whose specific conductance is 1.26 × 10–3 Ω-1 cm-1 are ________ Ω-1cm2 eq-1 


Solution:

*Answer can only contain numeric values
QUESTION: 22

The conductivity of 0.1 M NaOH solution is 0.0221 Ω-1 cm-1. When an equal volume of 0.1 M HCl is added, the conductivity decreases to 0.0056 Ω-1 cm-1. A further addit ion HCl solution, the volume of which of which is equal to that of the first portion added, the conductivity increases to 0.017 Ω-1 cm-1


Solution:

*Answer can only contain numeric values
QUESTION: 23

The conductivity of 0.1 M NaOH solution is 0.0221 Ω-1 cm-1. When an equal volume of 0.1 M HCl is added, the conductivity decreases to 0.0056 Ω-1 cm-1. A further addit ion HCl solution, the volume of which of which is equal to that of the first portion added, the conductivity increases to 0.017 Ω-1 cm-1. ________, _____ and _______ Ω-1 cm-1 respectively:


Solution:



*Answer can only contain numeric values
QUESTION: 24

The specific conductance of a saturated solution of AgCl at 25ºC after subtracting the specific conductance of water is 2.28 × 10–4 Sm–1. The molar ionic conductance of Ag+ and Cl ions are 73.3 × 10–4 and 65 × 10–4 Sm2 mol–1. The solubility of AgCl at 25ºC is _______ g/dm3.


Solution:

= (73.3 + 65) ×10-4 S m2 mol-1 = 0.01383 S m2 mol-1 = 0.01383 ×104 S cm2 mol-1 K = 2.28 ×10-4 S m-1 = 2.28 ×10-6 S cm-1


1mol of AgCl = 108 + 35.5 = 143.5g
B = 1.648 ×10-5 ×143.5g / L or g / dm3
= 2.36 ×10-3 g dm-3

*Answer can only contain numeric values
QUESTION: 25

The ionic conductivities at infinite dilution of Ox2–, K+ and Na+ are 148.2, 50.1 and 73.5 Ω-1 cm2 mol-1 respectively. The equivalent conductivities at infinite dilution of the salt KOOC. COONa is  _______ Ω-1 cm2 mol-1


Solution:


= 50.1 + 148.2 + 73.5 = 271.8Ω-1cm 2 mol-1

*Answer can only contain numeric values
QUESTION: 26

The molar conductivity of NH4Cl at infinite dilution is 149.7 Ω-1 cm2 mol-1 and the ionic conductivities of OH- and Cl- ions are 198 and 76.3 Ω-1 cm2 mol-1 respectively. The molar conductivity of NH4OH at the dilution is _______ Ω-1 cm2 mol-1:


Solution:

= (149.7 - 76.3 + 198)Ω-1cm2 mol-1
= 271.4Ω-1cm2 mol-1

*Answer can only contain numeric values
QUESTION: 27

A conductivity cell whose cell constant is 2cm–1 is filled with 0.1 M acetic acid solution. Its resistance is found to be 3765 Ω. The degree of dissociation of acetic acid are ______ . Given that  and 


Solution:

*Answer can only contain numeric values
QUESTION: 28

The conductivity of a saturated solution of silver okalate is 4.5 × 10–5 Ω-1 cm-1. If its Ksp = 1.35 × 10-11 M3, the molar conductivity of the saturated solution would be _______  Ω-1 cm2 mol-1.


Solution:


*Answer can only contain numeric values
QUESTION: 29

The molar conductivity of 0.05 M of solution of an electrolyte is 200 Ω-1 cm2 mol-1. The resistance offered by a conductivity cell with cell constant (1/3 cm-1) would be _______Ω.


Solution:

*Answer can only contain numeric values
QUESTION: 30

A conductivity cell whose cell constant is 3 cm–1 is filled with 0.1 M solution of weak acids. Its resistance is found to be 3000 Ω.  the degree of dissociation of weak acid is _______.


Solution:

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