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question_answer1)
Which one of the following statements is correct [MP PET 1997]
A)
The oxidation number of oxygen in \[K{{O}_{2}}\] is zero done
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B)
The specific conductance of an electrolyte solution decreases with increase in dilution done
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C)
\[S{{n}^{2+}}\] oxidises \[F{{e}^{3+}}\] done
clear
D)
\[Zn/ZnS{{O}_{4}}\] is a reference electrode done
clear
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question_answer2)
In infinite dilutions, the equivalent conductances of \[B{{a}^{2+}}\] and \[C{{l}^{-}}\] are 127 and 76 \[oh{{m}^{-1}}c{{m}^{-1}}\] \[eqv{{t}^{-1}}\]. The equivalent conductivity of \[BaC{{l}_{2}}\]at indefinite dilution is [CBSE 2000]
A)
101.5 done
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B)
139.5 done
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C)
203.5 done
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D)
279.5 done
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question_answer3)
The factor which is not affecting the conductivity of any solution is
A)
Dilution done
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B)
Nature of electrolyte done
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C)
Temperature done
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D)
None of these done
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question_answer4)
Specific conductance of 0.1 m nitric acid is \[6.3\times {{10}^{-2}}\,oh{{m}^{-1}}c{{m}^{-1}}\]. The molar conductance of solution is [Kerala (Med.) 2003]
A)
630 \[oh{{m}^{-1}}c{{m}^{2}}mol{{e}^{-1}}\] done
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B)
315 \[oh{{m}^{-1}}c{{m}^{2}}mol{{e}^{-1}}\] done
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C)
100 \[oh{{m}^{-1}}c{{m}^{2}}mol{{e}^{-1}}\] done
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D)
6300 \[oh{{m}^{-1}}c{{m}^{2}}mol{{e}^{-1}}\] done
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E)
63.0 \[oh{{m}^{-1}}c{{m}^{2}}mol{{e}^{-1}}\] done
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question_answer5)
The conductivity of strong electrolyte is [CPMT 2003]
A)
Increase on dilution slightly done
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B)
Decrease on dilution done
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C)
Does not change with dilution done
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D)
Depend upon density of electrolytes itself done
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question_answer6)
If X is the specific resistance of the solution and M is the molarity of the solution, the molar conductivity of the solution is given by [Kurukshetra CEE 2002]
A)
\[\frac{1000X}{M}\] done
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B)
\[\frac{1000}{MX}\] done
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C)
\[\frac{1000M}{X}\] done
clear
D)
\[\frac{MX}{1000}\] done
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question_answer7)
Conductivity (unit Siemen?s) is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel then the unit of the constant of proportionality is [AIEEE 2002]
A)
\[Sm\,\,mo{{l}^{-1}}\] done
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B)
\[S{{m}^{2}}\,\,mo{{l}^{-1}}\] done
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C)
\[{{S}^{-2}}{{m}^{2}}\,\,mo{{l}^{{}}}\] done
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D)
\[{{S}^{2}}{{m}^{2}}\,\,mo{{l}^{-2}}\] done
clear
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question_answer8)
If one end of a piece of a metal is heated, the other end becomes hot after some time. This is due to [CBSE PMT 1995]
A)
Energised electrons moving to the other part of the metal done
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B)
Resistance of the metal done
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C)
Mobility of atoms in the metal done
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D)
Minor perturbation in the energy of atoms done
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question_answer9)
Conductivity of a solution is directly proportional to [KCET 1984]
A)
Dilution done
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B)
Number of ions done
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C)
Current density done
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D)
Volume of the solution done
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question_answer10)
The increase in equivalent conductance of an electrolyte solution with dilution is due to the increase in [MP PMT 1996]
A)
Ionic attraction done
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B)
Molecular attraction done
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C)
Degree of association of the electrolyte done
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D)
Degree of ionisation of the electrolyte done
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question_answer11)
Which of the following conducts electricity [AFMC 1995]
A)
Fused \[NaCl\] done
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B)
\[C{{O}_{2}}\] done
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C)
\[B{{r}_{2}}\] done
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D)
\[Si\] done
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question_answer12)
Which of the following shows electrical conduction [CBSE PMT 1999; AIIMS 1999]
A)
Potassium done
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B)
Graphite done
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C)
Diamond done
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D)
Sodium done
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question_answer13)
The unit of equivalent conductivity is [CPMT 1999; BCECE 2005]
A)
ohm cm done
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B)
\[oh{{m}^{-1}}c{{m}^{2}}\,{{(gm\,\ equivalent)}^{-1}}\] done
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C)
ohm \[c{{m}^{2}}\,(gm\,\,equivalent)\] done
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D)
\[S\,c{{m}^{-2}}\] done
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question_answer14)
It has been observed that gaseous hydrogen chloride is a very poor conductor of electricity but a solution of hydrogen chloride gas in water is a good conductor of electricity. This is due to the fact that [NCERT 1976]
A)
Water is good conductor of electricity done
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B)
Hydrogen chloride gas in water solution ionizes done
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C)
A gas is non-conductor but a liquid conducts electricity done
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D)
Gas does not obey Ohm's law whereas solution does done
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question_answer15)
Electrolytic conduction differs from metallic conduction in that in the case of electrolytic conduction [KCET 1987; Bihar CEE 1992]
A)
The resistance increases with increasing temperature done
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B)
The resistance decreases with increasing temperature done
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C)
The flow of current does not generate heat done
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D)
The resistance is independent of the length of the conductor done
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question_answer16)
The electrolytic conductance is a direct measure of [KCET 1990; CPMT 2003]
A)
Resistance done
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B)
Potential done
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C)
Concentration done
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D)
Dissociation done
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question_answer17)
Conductivity of a strong electrolyte [KCET 1993]
A)
Increases on dilution done
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B)
Does not change considerably on dilution done
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C)
Decreases on dilution done
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D)
Depends on density done
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question_answer18)
Which of the following statements is not applicable to electrolytic conductors [AIIMS 1991]
A)
New products show up at the electrodes done
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B)
Ions are responsible for carrying the current done
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C)
Show a positive temperature coefficient for conductance done
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D)
A single stream of electrons flows from cathode to anode done
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question_answer19)
Which one is not a conductor of electricity [RPET 1999]
A)
\[NaCl\](aqueous) done
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B)
\[NaCl\] (solid) done
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C)
\[NaCl\] (molten) done
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D)
\[Ag\] metal done
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question_answer20)
Solid sodium chloride is bad conductor of electricity because
A)
It contains only molecules done
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B)
It does not possess ions done
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C)
The ions present in it are not free to move done
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D)
It does not contain free molecules done
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question_answer21)
Which of the following is a poor conductor of electricity [EAMCET 1992]
A)
\[C{{H}_{3}}COONa\] done
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B)
\[{{C}_{2}}{{H}_{5}}OH\] done
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C)
\[NaCl\] done
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D)
\[KOH\] done
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question_answer22)
The molar conductivity is maximum for the solution of concentration [DCE 2002]
A)
0.001 M done
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B)
0.005 M done
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C)
0.002 M done
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D)
0.004 M done
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question_answer23)
The unit of molar conductivity is [DCE 2002]
A)
\[{{\Omega }^{-1}}c{{m}^{-2}}mo{{l}^{-1}}\] done
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B)
\[{{\Omega }^{{}}}c{{m}^{-2}}mo{{l}^{-1}}\] done
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C)
\[{{\Omega }^{-1}}c{{m}^{2}}mo{{l}^{-1}}\] done
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D)
\[\Omega \ c{{m}^{2}}mol\] done
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question_answer24)
The highest electrical conductivity of the following aqueous solutions is of [AIEEE 2005]
A)
0.1 M acetic acid done
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B)
0.1 M chloroacetic acid done
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C)
0.1 M fluoroacetic acid done
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D)
0.1 M difluoroacetic acid done
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question_answer25)
Given \[l/a=0.5c{{m}^{-1}},\,R=50ohm,\,N=1.0\]. The equivalent conductance of the electrolytic cell is [Orissa JEE 2005]
A)
\[10\,oh{{m}^{-1}}c{{m}^{2}}gm\,e{{q}^{-1}}\] done
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B)
\[20\,oh{{m}^{-1}}c{{m}^{2}}gm\,e{{q}^{-1}}\] done
clear
C)
\[300\,oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\] done
clear
D)
\[100oh{{m}^{-1}}c{{m}^{2}}\,gme{{q}^{-1}}\] done
clear
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question_answer26)
If equivalent conductance of \[1M\] benzoic acid is \[12.8oh{{m}^{-1}}c{{m}^{2}}\] and if the conductance of benzoate ion and \[{{H}^{+}}\] ion are 42 and \[288.42\,oh{{m}^{-1}}c{{m}^{2}}\] respectively. its degree of dissociation is [DPMT 2005]
A)
39% done
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B)
3.9% done
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C)
0.35% done
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D)
0.039% done
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question_answer27)
The unit \[oh{{m}^{-1}}\] is used for [J & K 2005]
A)
Molar conductivity done
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B)
Equivalent conductivity done
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C)
Specific conductivity done
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D)
Conductivity done
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