-
question_answer1)
When electric current is passed through a cell having an electrolyte, the positive ions move towards the cathode and the negative ions towards the anode. If the cathode is pulled out of the solution [AIIMS 1980]
A)
The positive and negative ions will move towards the anode done
clear
B)
The positive ions will start moving towards the anode, the negative ions will stop moving done
clear
C)
The negative ions will continue to move towards the anode and the positive ions will stop moving done
clear
D)
The positive and negative ions will start moving randomly done
clear
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question_answer2)
If the half-cell reaction \[A+{{e}^{-}}\to \,{{A}^{-}}\] has a large negative reduction potential, it follows that [MNR 1992; UPSEAT 2000, 02]
A)
\[A\] is readily reduced done
clear
B)
\[A\] is readily oxidised done
clear
C)
\[{{A}^{-}}\] is readily reduced done
clear
D)
\[{{A}^{-}}\] is readily oxidized done
clear
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question_answer3)
Mark the false statement [MP PET 1997]
A)
A salt bridge is used to eliminate liquid junction potential done
clear
B)
The Gibbs free energy change, \[\Delta G\] is related with electromotive force \[(E)\], as \[\Delta G=-nFE\] done
clear
C)
Nernst equation for single electrode potential is \[E={{E}^{o}}-\frac{RT}{nF}\,\ln \,{{a}_{{{M}^{n+}}}}\] done
clear
D)
The efficiency of a hydrogen oxygen fuel cell is 23% done
clear
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question_answer4)
The specific conductance of a 0.1 N KCl solution at \[{{23}^{o}}C\] is \[0.012\,oh{{m}^{-1\,}}c{{m}^{-1}}\]. The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be [CBSE PMT 1999, 2000; KCET 2001]
A)
\[0.142\,c{{m}^{-1}}\] done
clear
B)
\[0.66\,c{{m}^{-1}}\] done
clear
C)
\[0.918\,c{{m}^{-1}}\] done
clear
D)
\[1.12\,c{{m}^{-1}}\] done
clear
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question_answer5)
Which of the following reactions occurs at the cathode of a common dry cell [NCERT 1978]
A)
\[Mn\,\to \,M{{n}^{2+}}+2{{e}^{-}}\] done
clear
B)
\[2Mn{{O}_{2}}+Z{{n}^{2+}}+2{{e}^{-}}\,\to \,\,ZnM{{n}_{2}}{{O}_{4}}\] done
clear
C)
\[2Zn{{O}_{2}}+M{{n}^{2+}}+2{{e}^{-}}\,\to \,\,MnZ{{n}_{2}}{{O}_{4}}\] done
clear
D)
\[Zn\,\to \,Z{{n}^{2+}}+2{{e}^{-}}\] done
clear
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question_answer6)
In \[Cu-Zn\] cell [BHU 1981]
A)
Reduction occurs at the copper cathode done
clear
B)
Oxidation occurs at the copper cathode done
clear
C)
Reduction occurs at the anode done
clear
D)
Chemical energy is converted to light energy done
clear
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question_answer7)
Which of the following reaction is used to make a fuel cell [AIIMS 2003]
A)
\[Cd(s)+2Ni{{(OH)}_{3}}(s)\to CdO(s)+2Ni(OH)+{{H}_{2}}O(l)\] done
clear
B)
\[Pb(s)+Pb{{O}_{2}}(s)+2{{H}_{2}}S{{O}_{4}}(aq)\to 2PbS{{O}_{4}}(s)+2{{H}_{2}}O(l)\] done
clear
C)
\[2{{H}_{2}}(g)+{{O}_{2}}(g)\to 2{{H}_{2}}O(l)\] done
clear
D)
\[2Fe(s)+{{O}_{2}}(g)+4{{H}^{+}}(aq)\to 2F{{e}^{2+}}(aq)+2{{H}_{2}}O(l)\] done
clear
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question_answer8)
When lead storage battery is charged [MP PET 2003]
A)
\[Pb{{O}_{2}}\]is dissolved done
clear
B)
\[{{H}_{2}}S{{O}_{4}}\]is regenerated done
clear
C)
\[PbS{{O}_{4}}\]is deposited on lead electrode done
clear
D)
Lead is deposited on lead electrode done
clear
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question_answer9)
When lead storage battery is charged [MP PET 1993; MP PMT 2000]
A)
Lead dioxide dissolves done
clear
B)
Sulphuric acid is regenerated done
clear
C)
The lead electrode becomes coated with lead sulphate done
clear
D)
The amount of sulphuric acid decreases done
clear
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question_answer10)
The electrolytic decomposition of dilute sulphonic acid with platinum electrode in cathodic reaction is [MNR 1988; UPSEAT 1999, 2002]
A)
Oxidation done
clear
B)
Reduction done
clear
C)
Oxidation and reduction both done
clear
D)
Neutralisation done
clear
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question_answer11)
Which colourless gas evolves, when \[N{{H}_{4}}Cl\] reacts with zinc in a dry cell battery [Orissa JEE 2003]
A)
\[N{{H}_{4}}\] done
clear
B)
\[{{N}_{2}}\] done
clear
C)
\[{{H}_{2}}\] done
clear
D)
\[C{{l}_{2}}\] done
clear
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question_answer12)
Which of the substances \[Na,\,\,Hg,\,\,S,\,\,Pt\] and graphite can be used as electrodes in electrolytic cells having aqueous solutions [AIIMS 1982]
A)
\[Na,\,\,Pt\]and graphite done
clear
B)
\[Na\]and \[Hg\] done
clear
C)
\[Pt\]and graphite only done
clear
D)
\[Na\]and \[Al\]only done
clear
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question_answer13)
In electrolysis of dilute \[{{H}_{2}}S{{O}_{4}}\]using platinum electrodes [DPMT 1983; IIT 1983; Kurukshetra CET 2002; AFMC 2005]
A)
\[{{H}_{2}}\] is evolved at cathode done
clear
B)
\[N{{H}_{3}}\] is produced at anode done
clear
C)
\[C{{l}_{2}}\] is obtained at cathode done
clear
D)
\[{{O}_{2}}\] is produced done
clear
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question_answer14)
For cell reaction, \[Zn+C{{u}^{2+}}\to Z{{n}^{2+}}+Cu,\] cell representation is cell cell [BCECE 2005]
A)
Zn | Zn2+||Cu2+|Cu done
clear
B)
Cu | Cu2+ ||Zn2+| Zn done
clear
C)
Cu | Zn2+ || Zn | Cu2+ done
clear
D)
Cu2+ | Zn || Zn2+ | Cu done
clear
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question_answer15)
Which one is not called a anode reaction from the following
A)
\[C{{l}^{-}}\,\to \,\frac{1}{2}C{{l}_{2}}+{{e}^{-}}\] done
clear
B)
\[Cu\,\to \,C{{u}^{++}}+2{{e}^{-}}\] done
clear
C)
\[H{{g}^{+}}\,\to \,H{{g}^{++}}+{{e}^{-}}\] done
clear
D)
\[Z{{n}^{2+}}+2{{e}^{-}}\,\to \,Zn\] done
clear
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question_answer16)
A cell from the following which converts electrical energy into chemical energy
A)
Dry cell done
clear
B)
Electrochemical cell done
clear
C)
Electrolytic cell done
clear
D)
None of these done
clear
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question_answer17)
In the cell \[Zn\,\,|\,\,Z{{n}^{2+}}\,\,||\,\,C{{u}^{2+}}\,\,|\,\,Cu,\] the negative electrode is [MP PMT 1995]
A)
\[Cu\] done
clear
B)
\[C{{u}^{2+}}\] done
clear
C)
\[Zn\] done
clear
D)
\[Z{{n}^{2+}}\] done
clear
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question_answer18)
Which of the following statements is correct ? Galvanic cell converts [KCET 1991; MP PMT 1993]
A)
Chemical energy into electrical energy done
clear
B)
Electrical energy into chemical energy done
clear
C)
Metal from its elemental state to the combined state done
clear
D)
Electrolyte into individual ions done
clear
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question_answer19)
Hydrogen?oxygen fuel cells are used in space?craft to supply [MP PMT 1993; MP PET 1999]
A)
Power for heat and light done
clear
B)
Power for pressure done
clear
C)
Oxygen done
clear
D)
Water done
clear
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question_answer20)
The standard cell potential of \[Zn|Z{{n}^{2+}}_{(aq)}||C{{u}^{2+}}_{(aq)}|Cu\] cell is 1.10 V. The maximum work obtained by this cell will be [MP PET 2002]
A)
106.15 kJ done
clear
B)
? 212.30 kJ done
clear
C)
? 318.45 kJ done
clear
D)
? 424.60 kJ done
clear
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question_answer21)
The relationship between standard reduction potential of cell and equilibrium constant is shown by [MP PET 2002]
A)
\[E_{cell}^{0}=\frac{n}{0.059}\log {{K}_{c}}\] done
clear
B)
\[E_{cell}^{0}=\frac{0.059}{n}\log {{K}_{c}}\] done
clear
C)
\[E_{cell}^{0}=0.059\,n\,\log {{K}_{c}}\] done
clear
D)
\[E_{cell}^{0}=\frac{\log {{K}_{c}}}{n}\] done
clear
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question_answer22)
Consider the Galvanic cell \[\,Z{{n}^{\Theta }}|ZnS{{O}_{4}}||CuS{{O}_{4}}|C{{u}^{\oplus }}\] the reaction at cathode is [AMU 2000]
A)
\[Z{{n}^{2}}^{+}+2{{e}^{-}}\to Zn\] done
clear
B)
\[C{{u}^{2+}}+2{{e}^{-}}\to Cu\] done
clear
C)
\[C{{u}^{2+}}+Zn\to Cu+Z{{n}^{2+}}\] done
clear
D)
\[Z{{n}^{2+}}+Cu\to Zn+C{{u}^{2+}}\] done
clear
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question_answer23)
The cell reaction \[Cu+2A{{g}^{+}}\to C{{u}^{+2}}+Ag\] is best represented by [AMU 2000]
A)
\[C{{u}_{(s)}}|C{{u}^{+2}}_{(aq)}||A{{g}^{+}}_{(aq)}|A{{g}_{(s)}}\] done
clear
B)
\[Pt|C{{u}^{+2}}||A{{g}^{+}}_{(aq)}|A{{g}_{(s)}}\] done
clear
C)
\[C{{u}^{+2}}|Cu||Pt|Ag\] done
clear
D)
None of the above representations done
clear
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question_answer24)
\[\underset{\text{(anode)}\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{Z{{n}_{(s)}}|Z{{n}^{2+}}_{(aq)}|}}\,|\underset{\text{(cathode)}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{C{{u}^{2+}}_{(aq)}|C{{u}_{(s)}}}}\,\]is [Kerala (Engg.) 2002]
A)
Weston cell done
clear
B)
Daniel cell done
clear
C)
Calomel cell done
clear
D)
Faraday cell done
clear
E)
Standard cell done
clear
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question_answer25)
The specific conductance of a solution is 0.2 \[oh{{m}^{-1}}c{{m}^{-1}}\]and conductivity is 0.04 \[oh{{m}^{-1}}\]. The cell constant would be [RPET 1999]
A)
1 \[c{{m}^{-1}}\] done
clear
B)
0 \[c{{m}^{-1}}\] done
clear
C)
5 \[c{{m}^{-1}}\] done
clear
D)
0.2 \[c{{m}^{-1}}\] done
clear
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question_answer26)
If the conductance and specific conductance of a solution is one then its cell constant would be [RPET 1999]
A)
1 done
clear
B)
Zero done
clear
C)
0.5 done
clear
D)
4 done
clear
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question_answer27)
Saturated solution of \[KN{{O}_{3}}\] is used to make ?salt-bridge? because [IIT Screening 2002]
A)
Velocity of \[{{K}^{+}}\] is greater than that of \[NO_{3}^{-}\] done
clear
B)
Velocity of \[NO_{3}^{-}\] is greater than that of \[{{K}^{+}}\] done
clear
C)
Velocities of both \[{{K}^{+}}\]and \[NO_{3}^{-}\] are nearly the same done
clear
D)
\[KN{{O}_{3}}\]is highly soluble in water done
clear
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question_answer28)
In balancing the half reaction \[{{S}_{2}}O_{3}^{2-}\to {{S}_{(s)}}\] the number of electrons that must be added is [DPMT 2000]
A)
4 on the left done
clear
B)
3 on the right done
clear
C)
2 on the left done
clear
D)
2 on the right done
clear
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question_answer29)
Which one of the following statement is true for a electrochemical cell [Pb. PMT 1999; KCET 1999]
A)
\[{{H}_{2}}\]is cathode and \[Cu\] is anode done
clear
B)
\[{{H}_{2}}\] is anode and \[Cu\] is cathode done
clear
C)
Reduction occurs at \[{{H}_{2}}\]electrode done
clear
D)
Oxidation occurs at \[Cu\] electrode done
clear
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question_answer30)
In the reaction \[Cu(s)+2A{{g}^{+}}(aq)\to C{{u}^{2+}}(aq)+2Ag(s)\] The reduction half-cell reaction is [AIIMS 1997]
A)
\[Cu+2{{e}^{-}}\to C{{u}^{2-}}\] done
clear
B)
\[Cu-2{{e}^{-}}\to C{{u}^{2+}}\] done
clear
C)
\[A{{g}^{+}}+{{e}^{-}}\to Ag\] done
clear
D)
\[Ag-{{e}^{-}}\to A{{g}^{+}}\] done
clear
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question_answer31)
Which of the following statements about galvanic cell is incorrect [JIPMER 1997]
A)
Anode is positive done
clear
B)
Oxidation occurs at the electrode with lower reduction potential done
clear
C)
Cathode is positive done
clear
D)
Reduction occurs at cathode done
clear
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question_answer32)
The molar conductances of \[NaCl,\,HCl\] and \[C{{H}_{3}}COONa\] at infinite dilution are 126.45, 426.16 and \[91\,oh{{m}^{-1}}\,c{{m}^{2}}\,mo{{l}^{-1}}\] respectively. The molar conductance of \[C{{H}_{3}}COOH\] at infinite dilution is [CBSE PMT 1997]
A)
\[201.28\,oh{{m}^{-1}}\,c{{m}^{2}}\,mo{{l}^{-1}}\] done
clear
B)
\[390.71\,oh{{m}^{-1}}c{{m}^{2}}\,mo{{l}^{-1}}\] done
clear
C)
\[698.28\,oh{{m}^{-1}}\,c{{m}^{2}}\,mo{{l}^{-1}}\] done
clear
D)
\[540.48\,oh{{m}^{-1}}c{{m}^{2}}\,mo{{l}^{-1}}\] done
clear
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question_answer33)
The electrodes of a conductivity cell are \[3\,cm\] apart and have a cross-sectional area of \[4\,c{{m}^{2}}\]. The cell constant of the cell (in \[c{{m}^{-1}}\]) is
A)
\[4\times 3\] done
clear
B)
\[4/3\] done
clear
C)
\[3/4\] done
clear
D)
\[9/4\] done
clear
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question_answer34)
The anode half-reaction occurring during the discharge of a lead storage battery is
A)
\[Pb(s)+S{{O}_{2}}+{{O}_{2}}\to PbS{{O}_{4}}(s)\] done
clear
B)
\[Pb(s)+SO_{4}^{2-}(aq)\]⇌\[PbS{{O}_{4}}(s)+2{{e}^{-}}\] done
clear
C)
\[Pb{{O}_{2}}(s)+4{{H}^{+}}(aq)+2{{e}^{-}}+SO_{4}^{2-}(aq)\]⇌ \[PbS{{O}_{4}}(s)+2{{H}_{2}}O\] done
clear
D)
\[P{{b}^{2+}}(aq)+SO_{4}^{2-}(aq)\to PbS{{O}_{4}}(s)\] done
clear
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question_answer35)
The unit of cell constant is [MP PET 1996]
A)
\[oh{{m}^{-1}}\,c{{m}^{-1}}\] done
clear
B)
\[ohm\,cm\] done
clear
C)
\[cm\] done
clear
D)
\[c{{m}^{-1}}\] done
clear
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question_answer36)
In dry cell the reaction which takes place at the zinc anode is [MP PET 1996]
A)
\[Z{{n}^{2+}}+2{{e}^{-}}\to Zn(s)\] done
clear
B)
\[Zn(s)\to Z{{n}^{2+}}+2{{e}^{-}}\] done
clear
C)
\[M{{n}^{2+}}+2{{e}^{-}}\to Mn(s)\] done
clear
D)
\[Mn(s)\to M{{n}^{+}}+{{e}^{-}}+1.5V\] done
clear
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question_answer37)
The chemical reaction taking place at the anode of a cell is [MP PET 1996]
A)
Ionisation done
clear
B)
Reduction done
clear
C)
Oxidation done
clear
D)
Hydrolysis done
clear
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question_answer38)
Which of the following reactions occurs at the cathode during the charging of a lead storage battery [Manipal MEE 1995; MP PET 2002]
A)
\[P{{b}^{2+}}+2{{e}^{-}}\to Pb\] done
clear
B)
\[P{{b}^{2+}}+SO_{4}^{2-}\to PbS{{O}_{4}}\] done
clear
C)
\[Pb\to P{{b}^{2+}}+2{{e}^{-}}\] done
clear
D)
\[PbS{{O}_{4}}+2{{H}_{2}}O\to 2Pb{{O}_{2}}+4SO_{4}^{2-}+2{{e}^{-}}\] done
clear
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question_answer39)
A depolarizer used in dry cell batteries is [NCERT 1981]
A)
Ammonium chloride done
clear
B)
Manganese dioxide done
clear
C)
Potassium hydroxide done
clear
D)
Sodium phosphate done
clear
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question_answer40)
When a lead storage battery is discharged [IIT 1987; MP PMT 2004]
A)
\[F{{e}^{2+}}\]is evolved done
clear
B)
Lead sulphate is consumed done
clear
C)
Lead is formed done
clear
D)
Sulphuric acid is consumed done
clear
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question_answer41)
In electroplating, the article to be electroplated serves as [AMU 1982, 83]
A)
Cathode done
clear
B)
Electrolyte done
clear
C)
Anode done
clear
D)
Conductor done
clear
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question_answer42)
The position of some metals in the electrochemical series in decreasing electropositive character is given as \[Mg>Al>Zn>Cu>Ag.\] What will happen, if a copper spoon is used to stir a solution of aluminium nitrate [NCERT 1977]
A)
The spoon will get coated with \[Al\] done
clear
B)
An alloy of \[Cu\] and \[Al\] is formed done
clear
C)
The solution becomes blue done
clear
D)
There is no reaction done
clear
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question_answer43)
In a electrochemical cell [AFMC 1989]
A)
Potential energy changes into kinetic energy done
clear
B)
Kinetic energy changes into potential energy done
clear
C)
Chemical energy changes into electrical energy done
clear
D)
Electrical energy changes into chemical energy done
clear
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question_answer44)
In galvanic cell, the salt bridge is used to [MP PMT 2002]
A)
Complete the circuit done
clear
B)
Reduce the electric resistance in the cell done
clear
C)
Separate cathode from anode done
clear
D)
Carry salts for the chemical reaction done
clear
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question_answer45)
If a strip of \[Cu\] metal is placed in a solution of ferrous sulphate [NCERT 1974; CPMT 1977; MP PET 2000]
A)
Copper will precipitate out done
clear
B)
Iron will precipitate out done
clear
C)
Copper will dissolve done
clear
D)
No reaction will take place done
clear
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question_answer46)
Which of the following is not used to construct salt bridge [MP PET 2003]
A)
\[C{{H}_{3}}COOK\] done
clear
B)
\[KCl\] done
clear
C)
\[N{{H}_{4}}N{{O}_{3}}\] done
clear
D)
\[KN{{O}_{3}}\] done
clear
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question_answer47)
The reference electrode is made by using [MP PMT 2002]
A)
\[ZnC{{l}_{2}}\] done
clear
B)
\[CuS{{O}_{4}}\] done
clear
C)
\[HgC{{l}_{2}}\] done
clear
D)
\[H{{g}_{2}}C{{l}_{2}}\] done
clear
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question_answer48)
In a hydrogen ? oxygen fuel cell, combustion of hydrogen occurs to [AIEEE 2004]
A)
Produce high purity water done
clear
B)
Create potential difference between the two electrodes done
clear
C)
Generate heat done
clear
D)
Remove adsorbed oxygen from electrode surfaces done
clear
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question_answer49)
\[{{\lambda }_{ClC{{H}_{2}}COONa}}=224\,oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\], \[{{\lambda }_{NaCl}}=38.2\,oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\], \[{{\lambda }_{HCl}}=203\,oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\], What is the value of \[{{\lambda }_{ClC{{H}_{2}}COOH}}\] [JEE Orissa 2004]
A)
\[288.5\ oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\] done
clear
B)
\[289.5\ oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\] done
clear
C)
\[388.5\ oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\] done
clear
D)
\[59.5\ oh{{m}^{-1}}c{{m}^{2}}gme{{q}^{-1}}\] done
clear
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question_answer50)
Which of the following statement is true for the electrochemical Daniel cell [AIIMS 2004]
A)
Electrons flow from copper electrode to zinc electrode done
clear
B)
Current flows from zinc electrode to copper electrode done
clear
C)
Cations move toward copper electrode which is cathode done
clear
D)
Cations move toward zinc electrode done
clear
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question_answer51)
Which of the following statement is true for an electrochemical cell [Pb.CET 2002]
A)
\[{{H}_{2}}\]is cathode and \[Cu\]is anode done
clear
B)
\[{{H}_{2}}\] is anode and Cu is cathode done
clear
C)
Reduction occurs at \[{{H}_{2}}\]electrode done
clear
D)
Oxidation occurs at Cu electrode done
clear
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question_answer52)
Which of the following statements are true for an fuel cells [DPMT 2004]
A)
They run till the reactants are active done
clear
B)
They are free from pollution done
clear
C)
They are more efficient done
clear
D)
All of the above done
clear
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question_answer53)
For gold plating, the electrolyte used is [Pb.CET 2004]
A)
\[AuC{{l}_{3}}\] done
clear
B)
\[HAuC{{l}_{4}}\] done
clear
C)
\[k[Au{{(CN)}_{2}}]\] done
clear
D)
None of these done
clear
View Solution play_arrow
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question_answer54)
The acid used in lead storage battery is [Pb.CET 2003]
A)
\[{{H}_{2}}S{{O}_{4}}\] done
clear
B)
\[{{H}_{3}}P{{O}_{4}}\] done
clear
C)
HCl done
clear
D)
\[HN{{O}_{3}}\] done
clear
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question_answer55)
At 25°C specific conductivity of a normal solution of KCl is 0.002765 mho. The resistance of cell is 400 ohms. The cell constant is [Pb.PMT 2004]
A)
0.815 done
clear
B)
1.016 done
clear
C)
1.106 done
clear
D)
2.016 done
clear
View Solution play_arrow
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question_answer56)
Which of the following is used widely in the manufacture of lead storage battery [BHU 2004]
A)
Arsenic done
clear
B)
Lithium done
clear
C)
Bismuth done
clear
D)
Antimony done
clear
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question_answer57)
The chemical reaction, \[2AgCl(s)+{{H}_{2}}(g)\ \to \] \[2HCl(aq)+2Ag(s)\] taking place in a galvanic cell is represented by the notation [AIIMS 2005]
A)
\[Pt|{{H}_{2}}(g),1\text{bar }\!\!|\!\!\text{ 1}M\ KCl(aq)|AgCl(s)|Ag(s)\] done
clear
B)
\[Pt(s)|{{H}_{2}}(g),\ 1\text{bar }\!\!|\!\!\text{ }\ 1M\ HCl(aq)||1M\ A{{g}^{+}}(aq)|Ag(s)\] done
clear
C)
\[Pt(s)|{{H}_{2}}(g),\ 1\text{bar }\!\!|\!\!\text{ }\ 1M\ HCl(aq)|AgCl(s)|Ag(s)\] done
clear
D)
\[Pt(s)|{{H}_{2}}(g),\ 1\text{bar }\!\!|\!\!\text{ }\ 1M\ HCl(aq)|Ag(s)|AgCl(s)\] done
clear
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question_answer58)
If the \[Z{{n}^{2+}}/Zn\] electrode is diluted to 100 times then the change in e.m.f. [DPMT 2005]
A)
Increase of \[59\,mV\] done
clear
B)
Decrease of \[59\,mV\] done
clear
C)
Increase of \[29.5\,mV\] done
clear
D)
Decrease of \[29.5\,mV\] done
clear
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question_answer59)
If hydrogen electrode dipped in 2 solution of \[pH=3\] and \[pH=6\] and salt bridge is connected the e.m.f. of resulting cell is [DPMT 2005]
A)
0.177 V done
clear
B)
0.3 V done
clear
C)
0.052 V done
clear
D)
0.104 V done
clear
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question_answer60)
The tendency of an electrode to lose electrons is known as [J & K 2005]
A)
Electrode potential done
clear
B)
Reduction potential done
clear
C)
Oxidation potential done
clear
D)
e.m.f. done
clear
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question_answer61)
When electric current is supplied through an ionic hydride of fused state, then [Kerala CET 2005]
A)
Hydrogen is obtained at anode done
clear
B)
Hydrogen is obtained at cathode done
clear
C)
No change done
clear
D)
Hydride ion moves towards cathode done
clear
E)
hydride ion present in solution done
clear
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