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question_answer1)
Which of the following is non-electrolyte [CPMT 2001]
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_answer2)
Ammonium hydroxide is a [CPMT 1977]
A)
Strong electrolyte done
clear
B)
Weak electrolyte done
clear
C)
Both under different conditions done
clear
D)
Non-electrolyte done
clear
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question_answer3)
Ammonium hydroxide is a weak base because [MP PET 2000]
A)
It has low vapour pressure done
clear
B)
It is only slightly ionized done
clear
C)
It is not a hydroxide of any metal done
clear
D)
It has low density done
clear
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question_answer4)
Electrolytes when dissolved in water dissociate into their constituent ions. The degree of dissociation of an electrolyte increases with [CPMT 1974]
A)
Increasing concentration of the electrolyte done
clear
B)
Decreasing concentration of the electrolyte done
clear
C)
Decreasing temperature done
clear
D)
Presence of a substance yielding a common ion done
clear
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question_answer5)
An electrolyte [MP PMT/PET 1988; CPMT 1974]
A)
Gives complex ions in solution done
clear
B)
Dissolves in water to give ions done
clear
C)
Is ionized in the solid state done
clear
D)
Generates ions on passing electric current done
clear
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question_answer6)
A monoprotic acid in 1.00 M solution is 0.01% ionised. The dissociation constant of this acid is [BVP 2003]
A)
\[1\times {{10}^{-8}}\] done
clear
B)
\[1\times {{10}^{-4}}\] done
clear
C)
\[1\times {{10}^{-6}}\] done
clear
D)
\[{{10}^{-5}}\] done
clear
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question_answer7)
Molten sodium chloride conducts electricity due to the presence of [BHU 2001]
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_answer8)
An example for a strong electrolyte is [KCET 2002]
A)
Urea done
clear
B)
Ammonium hydroxide done
clear
C)
Sugar done
clear
D)
Sodium acetate done
clear
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question_answer9)
Which one is strongest electrolyte in the following [CPMT 1990]
A)
\[NaCl\] done
clear
B)
\[C{{H}_{3}}COOH\] done
clear
C)
\[N{{H}_{4}}OH\] done
clear
D)
\[{{C}_{6}}{{H}_{12}}{{O}_{6}}\] done
clear
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question_answer10)
The equivalent conductance at infinite dilution of a weak acid such as \[HF\] [Pb. PMT 1998]
A)
Can be determined by measurement of very dilute \[HF\] solution done
clear
B)
Can be determined by extrapolation of measurements on dilute solutions of \[HCl,\,\,HBr\] and \[HI\] done
clear
C)
Can best be determined from measurements on dilute solutions of \[NaF,\,\,NaCl\] and \[HCl\] done
clear
D)
Is an undefined quantity done
clear
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question_answer11)
If \[\alpha \] is the degree of ionization, \[C\] the concentration of a weak electrolyte and \[{{K}_{a}}\]the acid ionization constant, then the correct relationship between \[\alpha ,\,\,C\] and \[{{K}_{a}}\]is [CET Pune 1998; Pb. PMT 1998; RPMT 2002]
A)
\[{{\alpha }^{2}}=\sqrt{\frac{{{K}_{a}}}{C}}\] done
clear
B)
\[{{\alpha }^{2}}=\sqrt{\frac{C}{{{K}_{a}}}}\] done
clear
C)
\[\alpha =\sqrt{\frac{{{K}_{a}}}{C}}\] done
clear
D)
\[\alpha =\sqrt{\frac{C}{{{K}_{a}}}}\] done
clear
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question_answer12)
Theory of ionization was given by [AMU 1983; DPMT 1985]
A)
Rutherford done
clear
B)
Graham done
clear
C)
Faraday done
clear
D)
Arrhenius done
clear
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question_answer13)
An ionizing solvent has
A)
Low value of dielectric constant done
clear
B)
High value of dielectric constant done
clear
C)
A dielectric constant equal to 1 done
clear
D)
Has a high melting point done
clear
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question_answer14)
The extent of ionization increases [MNR 1982]
A)
With the increase in concentration of solute done
clear
B)
On addition of excess water to solution done
clear
C)
On decreasing the temperature of solution done
clear
D)
On stirring the solution vigorously done
clear
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question_answer15)
Which is generally true about ionic compounds [Pb. PMT 2002]
A)
Have low boiling point done
clear
B)
Have low melting point done
clear
C)
Soluble in non-polar solvents done
clear
D)
Conduct electricity in the fused state done
clear
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question_answer16)
At infinite dilution, the percentage ionisation for both strong and weak electrolytes is [CPMT 1999]
A)
1% done
clear
B)
20% done
clear
C)
50% done
clear
D)
100% done
clear
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question_answer17)
The degree of ionization of a compound depends on [MNR 1980]
A)
Size of solute molecules done
clear
B)
Nature of solute molecules done
clear
C)
Nature of vessel used done
clear
D)
Quantity of electricity passed done
clear
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question_answer18)
For a weak acid \[HA,\] Ostwald's dilution law is represented by the equation
A)
\[{{K}_{a}}=\frac{\alpha c}{1-{{\alpha }^{2}}}\] done
clear
B)
\[{{K}_{a}}=\frac{{{\alpha }^{2}}c}{1-\alpha }\] done
clear
C)
\[\alpha =\frac{{{K}_{a}}c}{1-c}\] done
clear
D)
\[{{K}_{a}}=\frac{{{\alpha }^{2}}c}{1-{{\alpha }^{2}}}\] done
clear
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question_answer19)
Acetic acid is a weak electrolyte because [CPMT 1974]
A)
Its molecular weight is high done
clear
B)
It is covalent compound done
clear
C)
It does not dissociate much or its ionization is very less done
clear
D)
It is highly unstable done
clear
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question_answer20)
In which of the following dissociation of \[N{{H}_{4}}OH\] will be minimum [MP PET 2000]
A)
\[NaOH\] done
clear
B)
\[{{H}_{2}}O\] done
clear
C)
\[N{{H}_{4}}Cl\] done
clear
D)
\[NaCl\] done
clear
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question_answer21)
Vant hoff factor of \[BaC{{l}_{2}}\] of conc. \[0.01M\] is 1.98. Percentage dissociation of \[BaC{{l}_{2}}\] on this conc. Will be [Kerala CET 2005]
A)
49 done
clear
B)
69 done
clear
C)
89 done
clear
D)
98 done
clear
E)
100 done
clear
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question_answer22)
In which of the following solutions, ions are present [NCERT 1981]
A)
Sucrose in water done
clear
B)
Sulphur in \[C{{S}_{2}}\] done
clear
C)
Caesium nitrate in water done
clear
D)
Ethanol in water done
clear
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question_answer23)
The following equilibrium exists inaqueous solution, \[C{{H}_{3}}COOH\]⇄\[C{{H}_{3}}CO{{O}^{-}}+{{H}^{+}}\] if dil HCl is added, without change in temperature, the [UPSEAT 2000, 02]
A)
Concentration of \[C{{H}_{3}}CO{{O}^{-}}\] will increase done
clear
B)
Concentration of \[C{{H}_{3}}CO{{O}^{-}}\] will decrease done
clear
C)
The equilibrium constant will increase done
clear
D)
The equilibrium constant will decrease done
clear
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question_answer24)
Which will not affect the degree of ionisation [MP PMT 1994]
A)
Temperature done
clear
B)
Concentration done
clear
C)
Type of solvent done
clear
D)
Current done
clear
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question_answer25)
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)
Electron transfer done
clear
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question_answer26)
The degree of dissociation of \[0.1\,M\,HCN\] solution is 0.01%. Its ionisation constant would be [RPMT 1999]
A)
\[{{10}^{-3}}\] done
clear
B)
\[{{10}^{-5}}\] done
clear
C)
\[{{10}^{-7}}\] done
clear
D)
\[{{10}^{-9}}\] done
clear
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question_answer27)
The hydrogen ion concentration in weak acid of dissociation constant \[{{K}_{a}}\]and concentration \[c\] is nearly equal to [CBSE PMT 1989; RPMT 2000]
A)
\[\sqrt{{{K}_{a}}/c}\] done
clear
B)
\[c/{{K}_{a}}\] done
clear
C)
\[{{K}_{a}}c\] done
clear
D)
\[\sqrt{{{K}_{a}}c}\] done
clear
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question_answer28)
Degree of dissociation of \[0.1\,N\,\,C{{H}_{3}}COOH\] is (Dissociation constant \[=1\times {{10}^{-5}}\]) [MP PET 1997]
A)
\[{{10}^{-5}}\] done
clear
B)
\[{{10}^{-4}}\] done
clear
C)
\[{{10}^{-3}}\] done
clear
D)
\[{{10}^{-2}}\] done
clear
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question_answer29)
Which of the following substance is an electrolyte [MADT Bihar 1980]
A)
Chloroform done
clear
B)
Benzene done
clear
C)
Toluene done
clear
D)
Magnesium chloride done
clear
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question_answer30)
In weak electrolytic solution, degree of ionization
A)
Will be proportional to dilution done
clear
B)
Will be proportional to concentration of electrolyte done
clear
C)
Will be proportional to the square root of dilution done
clear
D)
Will be reciprocal to the dilution done
clear
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question_answer31)
0.2 molar solution of formic acid is ionized 3.2%. Its ionization constant is [MP PMT 1991]
A)
\[1\times {{10}^{-12}}\] done
clear
B)
\[2.1\times {{10}^{-4}}\] done
clear
C)
\[1.25\times {{10}^{-6}}\] done
clear
D)
\[1\times {{10}^{-14}}\] done
clear
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question_answer32)
The best conductor of electricity is a 1.0 M solution of [NCERT 1973]
A)
Boric acid done
clear
B)
Acetic acid done
clear
C)
Sulphuric acid done
clear
D)
Phosphoric acid done
clear
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question_answer33)
The colour of an electrolyte solution depends on [DPMT 1985]
A)
The nature of the anion done
clear
B)
The nature of the cation done
clear
C)
The nature of both the ions done
clear
D)
The nature of the solvent done
clear
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question_answer34)
Ionisation depends upon [CPMT 2004]
A)
Pressure done
clear
B)
Volume done
clear
C)
Dilution done
clear
D)
None of these done
clear
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question_answer35)
The values of dissociation constants of some acids (at \[{{25}^{o}}C\]) are as follows. Indicate which is the trongest acid in water [MP PMT 1991]
A)
\[1.4\times {{10}^{-2}}\] done
clear
B)
\[1.6\times {{10}^{-4}}\] done
clear
C)
\[4.4\times {{10}^{-10}}\] done
clear
D)
\[4.3\times {{10}^{-7}}\] done
clear
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question_answer36)
Concentration \[C{{N}^{-}}\] in \[0.1\,M\,HCN\] is \[[{{K}_{a}}=4\times {{10}^{-10}}]\] [RPET 2000]
A)
\[2.5\times {{10}^{-6}}M\] done
clear
B)
\[4.5\times {{10}^{-6}}M\] done
clear
C)
\[6.3\times {{10}^{-6}}M\] done
clear
D)
\[9.2\times {{10}^{-6}}M\] done
clear
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