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question_answer1)
Which of the following will not conduct electricity in aqueous solution [AMU 1982, 83]
A)
Copper sulphate done
clear
B)
Sugar done
clear
C)
Common salt done
clear
D)
None of these done
clear
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question_answer2)
Strong electrolytes are those which [MNR 1983]
A)
Dissolve readily in water done
clear
B)
Conduct electricity done
clear
C)
Dissociate into ions at high dilution done
clear
D)
Completely dissociate into ions at all dilutions done
clear
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question_answer3)
In aqueous solution, strong electrolytes [AMU 1983, 84]
A)
Are partially ionized done
clear
B)
Do not ionise done
clear
C)
Ionise almost completely done
clear
D)
Form polymers done
clear
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question_answer4)
An electrolyte [KCET 1984; MP PET/PMT 1988]
A)
Forms complex ions in solution done
clear
B)
Gives ions only when electricity is passed done
clear
C)
Possesses ions even in solid state done
clear
D)
Gives ions only when dissolved in water done
clear
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question_answer5)
Electrolytes when dissolved in water dissociates into ions because [CPMT 1974, 78; MNR 1983]
A)
They are unstable done
clear
B)
The water dissolves it done
clear
C)
The force of repulsion increases done
clear
D)
The forces of electrostatic attraction are broken down by water done
clear
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question_answer6)
Electrolyte can conduct electricity because
A)
Their molecules contain unpaired electrons, which are mobile done
clear
B)
Their molecules contain loosely held electrons which get free under the influence of voltage done
clear
C)
The molecules break up into ions when a voltage is applied done
clear
D)
The molecules are broken up into ions when the electrolyte is fused or is dissolved in the solvent done
clear
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question_answer7)
Which one of the following metals could not be obtained on electrolysis of aqueous solution of its salts [IIT 1990]
A)
\[Ag\] done
clear
B)
\[Mg\] done
clear
C)
\[Cu\] done
clear
D)
\[Cr\] done
clear
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question_answer8)
Which of the following aqueous solution will conduct an electric current quite well [MP PMT 1987]
A)
Glycerol done
clear
B)
\[HCl\] done
clear
C)
Sugar done
clear
D)
Pure water done
clear
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question_answer9)
On the electrolysis of aqueous solution of sodium sulphate, on cathode we get [MP PMT 1992, 2002]
A)
\[Na\] done
clear
B)
\[{{H}_{2}}\] done
clear
C)
\[S{{O}_{2}}\] done
clear
D)
\[S{{O}_{3}}\] done
clear
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question_answer10)
Electrolysis involves oxidation and reduction respectively at [CPMT 1973; AMU 1983; NCERT 1983, 84; MH CET 2001]
A)
Anode and cathode done
clear
B)
Cathode and anode done
clear
C)
At both the electrodes done
clear
D)
None of the above done
clear
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question_answer11)
Which of the following compounds will not undergo decomposition on passing electricity through aqueous solution [MP PET 2001]
A)
Sugar done
clear
B)
Sodium Chloride done
clear
C)
Sodium Bromide done
clear
D)
Sodium Acetate done
clear
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question_answer12)
During the electrolysis of an electrolyte, the number of ions produced, is directly proportional to the [AFMC 2002]
A)
Time consumed done
clear
B)
Electro chemical equivalent of electrolysis done
clear
C)
Quantity of electricity passed done
clear
D)
Mass of electrons done
clear
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question_answer13)
When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are [AIEEE 2002]
A)
Cathode Anode Pure zinc Pure copper done
clear
B)
Impure sample Pure copper done
clear
C)
Impure zinc Impure sample done
clear
D)
Pure copper Impure sample done
clear
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question_answer14)
In the electrolytic cell, flow of electrons is from [IIT Screening 2003]
A)
Cathode to anode in solution done
clear
B)
Cathode to anode through external supply done
clear
C)
Cathode to anode through internal supply done
clear
D)
Anode to cathode through internal supply done
clear
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question_answer15)
An electric current is passed through an aqueous solution of the following. Which one shall decompose [NCERT 1972]
A)
Urea done
clear
B)
Glucose done
clear
C)
\[AgN{{O}_{3}}\] done
clear
D)
Ethyl alcohol done
clear
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question_answer16)
The electric conduction of a salt solution in water depends on the
A)
Shape of its molecules done
clear
B)
Size of its molecules done
clear
C)
Size of solvent molecules done
clear
D)
Extent of its ionization done
clear
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question_answer17)
A solution of sodium sulphate in water is electrolysed using inert electrodes. The products at the cathode and anode are respectively [IIT 1987,96]
A)
\[{{H}_{2}},\,\,\,{{O}_{2}}\] done
clear
B)
\[{{O}_{2}},\,\,{{H}_{2}}\] done
clear
C)
\[{{O}_{2}},\,\,Na\] done
clear
D)
\[{{O}_{2}},\,\,S{{O}_{2}}\] done
clear
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question_answer18)
On electrolysing a solution of dilute \[{{H}_{2}}S{{O}_{4}}\] between platinum electrodes, the gas evolved at the anode is [NCERT 1977, 79; MNR 1980; CBSE PMT 1992]
A)
\[S{{O}_{2}}\] done
clear
B)
\[I{{F}_{5}}\] done
clear
C)
\[{{O}_{2}}\] done
clear
D)
\[{{H}_{2}}\] done
clear
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question_answer19)
The addition of a polar solvent to a solid electrolyte results in [NCERT 1973]
A)
Polarization done
clear
B)
Association done
clear
C)
Ionization done
clear
D)
Non-liberation of heat done
clear
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question_answer20)
During the electrolysis of fused \[NaCl,\] which reaction occurs at anode [NCERT 1973; AFMC 1992; MP PMT 2002]
A)
Chloride ions are oxidized done
clear
B)
Chloride ions are reduced done
clear
C)
Sodium ions are oxidised done
clear
D)
Sodium ions are reduced done
clear
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question_answer21)
The amount of ion discharged during electrolysis is not directly proportional to [NCERT 1973]
A)
Resistance done
clear
B)
Time done
clear
C)
Current done
clear
D)
Chemical equivalent of the ion done
clear
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question_answer22)
Electrolysis of aqueous \[HCl\] solution produces [CPMT 1987]
A)
\[{{H}_{2}}\] gas at the anode done
clear
B)
\[{{H}_{2}}\] gas at the cathode done
clear
C)
\[C{{l}_{2}}\] gas at the cathode done
clear
D)
\[C{{l}_{2}}\] and \[{{O}_{2}}\] gases both at the anode done
clear
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question_answer23)
During electrolysis of \[NaCl\]solution, part of the reaction is \[N{{a}^{+}}+{{e}^{-}}\to Na.\] This is termed as [NCERT 1984]
A)
Oxidation done
clear
B)
Reduction done
clear
C)
Deposition done
clear
D)
Cathode reaction done
clear
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question_answer24)
When a solution of an electrolyte is heated the conductance of the solution [KCET 1991]
A)
Increases because of the electrolyte conducts better done
clear
B)
Decreases because of the increased heat done
clear
C)
Decreases because of the dissociation of the electrolyte is suppressed done
clear
D)
Increases because the electrolyte is dissociated more done
clear
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question_answer25)
The passage of current liberates \[{{H}_{2}}\] at cathode and \[C{{l}_{2}}\] at anode. The solution is [EAMCET 1979,87]
A)
Copper chloride in water done
clear
B)
\[NaCl\] in water done
clear
C)
\[{{H}_{2}}S{{O}_{4}}\] done
clear
D)
Water done
clear
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question_answer26)
Pure water does not conduct electricity because it [Manipal MEE 1995]
A)
Has a low boiling point done
clear
B)
Is almost totally unionized done
clear
C)
Is neutral done
clear
D)
Is readily decomposed done
clear
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question_answer27)
Which is responsible for electrical conduction of molten sodium chloride [MADT Bihar 1995]
A)
Free electrons done
clear
B)
Free ions done
clear
C)
Free molecules done
clear
D)
Atoms of sodium and chlorine done
clear
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question_answer28)
In electrolysis of aqueous copper sulphate, the gas at anode and cathode is [AFMC 1995]
A)
\[{{O}_{2}}\] and \[{{H}_{2}}\] done
clear
B)
\[S{{O}_{2}}\] and \[{{H}_{2}}\] done
clear
C)
\[{{H}_{2}}\] and \[{{O}_{2}}\] done
clear
D)
\[S{{O}_{3}}\] and \[{{O}_{2}}\] done
clear
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question_answer29)
Use of electrolysis is [AFMC 1995]
A)
Electroplating done
clear
B)
Electrorefining done
clear
C)
A and B both done
clear
D)
None of these done
clear
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question_answer30)
Sodium is made by the electrolysis of a molten mixture of about 40% \[NaCl\] and 60% \[CaC{{l}_{2}}\] because [CBSE PMT 1995]
A)
\[CaC{{l}_{2}}\] helps in conduction of electricity done
clear
B)
This mixture has a lower melting point than \[NaCl\] done
clear
C)
\[C{{a}^{++}}\] can displace \[Na\] from \[NaCl\] done
clear
D)
\[C{{a}^{++}}\] can reduce \[NaCl\] to \[Na\] done
clear
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question_answer31)
Electrolysis is a process in which the cations and anions of the electrolyte are [MP PET 1995]
A)
Hydrated done
clear
B)
Hydrolysed done
clear
C)
Charged done
clear
D)
Discharged done
clear
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question_answer32)
Degree of ionisation of a solution depends upon [BHU 1998]
A)
Temperature done
clear
B)
Nature of the electrolyte done
clear
C)
Nature of the solvent done
clear
D)
None of these done
clear
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question_answer33)
Which of the following is non-electrolytes [KCET (Med.) 1999]
A)
\[NaCl\] done
clear
B)
\[CaC{{l}_{2}}\] done
clear
C)
\[{{C}_{12}}{{H}_{22}}{{O}_{11}}\] done
clear
D)
\[C{{H}_{3}}COOH\] done
clear
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question_answer34)
When a molten ionic hydride is electrolysed [JIPMER 1999]
A)
Hydrogen is liberated at the cathode done
clear
B)
Hydrogen is liberated at the anode done
clear
C)
There is no reaction done
clear
D)
\[{{H}^{-}}\] ions produced migrate to the cathode done
clear
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question_answer35)
During electrolysis, the species discharged at cathode are [AFMC 2000]
A)
Ions done
clear
B)
Cation done
clear
C)
Anion done
clear
D)
All of these done
clear
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question_answer36)
Electrolysis of molten anhydrous calcium chloride produces [AIIMS 2000]
A)
Calcium done
clear
B)
Phosphorus done
clear
C)
Sulphur done
clear
D)
Sodium done
clear
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question_answer37)
Which of the following properties of pure metal makes it more useful then the corresponding alloy [RPET 2000]
A)
It is harder than corresponding alloy done
clear
B)
It has high density done
clear
C)
It can be extracted easily done
clear
D)
It conducts heat and electricity easily done
clear
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question_answer38)
Which of the following liberate hydrogen on reaction with dilute \[{{H}_{2}}S{{O}_{4}}\] [Roorkee 2000]
A)
\[Fe\] done
clear
B)
\[Cu\] done
clear
C)
\[Al\] done
clear
D)
\[Hg\] done
clear
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question_answer39)
Which one of the following material conducts electricity [Kerala (Med.) 2003]
A)
Diamond done
clear
B)
Crystalline sodium chloride done
clear
C)
Barium sulphate done
clear
D)
Fused potassium chloride done
clear
E)
Molten sulphur done
clear
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question_answer40)
Which of the following metals will give \[{{H}_{2}}\] on reaction with NaOH [RPET 2003]
A)
Mg done
clear
B)
Ba done
clear
C)
Ca done
clear
D)
Sr done
clear
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question_answer41)
Which of the following is not a non electrolyte [J & K 2005]
A)
Acetic acid done
clear
B)
Glucose done
clear
C)
Ethanol done
clear
D)
Urea done
clear
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