Q.1
Which of the following is a strong electrolyte? [ Pb CET 1994]
  • a) Ca(NO3)2
  • b) HCN
  • c)H2SO3
  • d)NH4OH
Q.2
The standard EMF of Danielle cell is 1.1 V. The maximum electrical work obtained from the Danielle cell is [MP PMT 2002]
  • a) 212.3 kJ
  • b) 175.4 kJ
  • c) 106.15 kJ
  • d) 53.07 kJ
Q.3
The oxidation potentials of A and B are +2.37 and +1.66V respectively. In chemical reactions ..[Pb CET 1997]
  • a) A will be replaced by B
  • b) A will replace B
  • c)A will not replace by B
  • d)A and b will not replace each other
Q.4
On the basis of information available from the reaction (4/3)Al + O2 → (2/3)Al2O3, ΔG=-827 kJmol-1of O2 the minimum emf required to carry out an electrolysis of Al2O3 is [ F=96500 C mol-) [ CBSE PMT 2003]
  • a) 2.14 V
  • b) 4.28 V
  • c)6.42 V
  • d)8.56 V
Q.5
Zn(s) + Cl2 (1atm) → Zn2+ + 2Cl-The E° of the cell is 2.12V. to increase E ..[ DPMT 2003]
  • a) Zn2+ concentration should be increased
  • b) Zn2+
  • c)Cl- concentration should be increased
  • d)partial pressure of Cl2 should be decreased
Q.6
Which one of the following cells can convert chemical energy of H2 and O2 directly into electrical energy? [ MP PMT 1998]
  • a) Mercury cell
  • b) Danielle cell
  • c) Fuel cell
  • d) lead storage cell
Q.7
Pure water does not conduct electricity because it .. [ manipal PMT 1995]
  • a)has low boiling point
  • b) is almost unionised
  • c)is neutral
  • d)is readily decomposed
Q.8
What is the potential of half-cell consisting of zinc electrode in 0.01m ZnSO4 solution at 25°C [ Eoxo=0.763V) [ manipal PMT 2001]
  • a) 0.8221 V
  • b) 8.221 V
  • c) 0.5282V
  • d)9.282V
Q.9
The equivalent conductance at infinite dilution of a weak acid such as HF [ Pb PMT 1998]
  • a) Can be determined by extrapolation of measurements on dilute solutions of HCl, HBr and HI
  • b) Can be determined by measurement on every dilute HF solutions
  • c) Can best be determined from measurements on dilute solutions of NaF, NaCl and HCl
  • d) Is an undefined quantity
Q.10
Reaction that takes place at graphite anode in dry cell is ..[MP PET 1996]
  • a)Zn2+ + 2e- → Zn(s)
  • b) Zn(s) → Zn2+ +2e-
  • c)Mn2+ +2e- → Mn(s)
  • d)Mn(s) → Mn+ + e- +1.5V
Q.11
An gives H2 gas with H2SO4 and HCl but not with HNO3 because [ CBSE PMT2002]
  • a) Zn acts as oxidizing agent when reacts with HNO3
  • b) HNO3 is weak acid than H2SO4 and HCl
  • c)In electrochemical series Zn is above hydrogen
  • d)NO3- is reduced in preference to hydronium ion
Q.12
Calculate the standard free energy change for reaction, 2Ag + 2H+ → H2 + 2Ag+ E° for Ag+ + e- → Ag is 0.80V [ ISM Dhanbad 1994]
  • a) +154.4 kJ
  • b) +308.8 kJ
  • c)-154.4 kJ
  • d)-308.8 kJ
Q.13
For the cell reaction,Cu2+ [C1(aq)] + Zn(s) → Zn2+ [C2(aq)] + Cu(s)of an electrochemical cell, the change in free energy, ΔG at a given temperature is a function of ..[CBSE PMT 1998]
  • a) ln(C1)
  • d) ln(C2)
  • b) ln(C₂/C₁)
  • c) ln(C₁ + C₂)
Q.14
Specific conductance of 0.1M sodium chloride solution is 1.06×10⁻² ohm-1 cm-Its molar conductance in ohm-1cm2 mol-1 is [ kerala MEE 2001]
  • a) 1.06 ×102
  • b) 1.06 ×103
  • c) 1.06 ×104
  • d) 5.3 ×102
Q.15
Specific conductance of 0.1M Nitric acid is 6.3 × 10⁻² ohm-1cmthe molar conductance of the solution is
  • a) 630 ohm-1 cm2
  • b) 315 ohm-1 cm2
  • c) 100 ohm-cm2
  • d) 6300 ohm-1cm2
Q.16
Ionic mobility of Ag+ is...λAg=5 ×10⁻⁴ ohm-1cm2 eq-1)[ orissa JEE 2003]
  • a) 5.2 ×10⁻¹⁹
  • b) 2.4 ×10⁻⁹
  • c)1.52 ×10⁻⁹
  • d)8.52 × 10⁻⁹
Q.17
electrolysis of dilute aqueous NaCl solution was carried out by passing 10 mili ampere current. The time required to liberate 0.01 mol of H2 gas at the cathode is ( 1 Faraday=96500 C mol-1){IIT 2008]
  • a)9.650 × 104 sec
  • b) 19.3 ×104 sec
  • c)28.95 × 104 sec
  • d)38.6 × 104 sec
Q.18
A solution of CuSO4 is electrolysed for 7 minutes with a current of 0.6amp. The amount of electricity passed is equal to [ Pb CET 1991]
  • a) 4.2 coulombs
  • c)126 coulombs
  • d)35 coulombs
  • b) 2.6 ×10⁻³ faraday
Q.19
How many coulombs of electricity are consumed when 100 mA current is passed through a solution of AgNO3 for half an hour during an electrolysis experiment? [ Pb CET 1989]
  • a) 108
  • b) 180
  • c) 1800
  • d) 18000
Q.20
The standard reduction potential for two reaction are given belowAgCl(s) + e- → Ag(s) + Cl-(aq), E°=0.22VAg+(aq) + e- → Ag(s) , E°=0.80Vthe solubility product of AgCl under standard condition of temperature (298K) is given by ..[kerala MEE 2003]
  • a) 1.6 ×10-
  • b) 1.5 ×10⁻¹⁰
  • c)3.2 ×10⁻⁸
  • d)3.2 ×10⁻¹⁰
0 h : 0 m : 1 s