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Q1. Agalvanic cell with electrode potential of ‘A’ = +2.23 V and ‘B’ = -1.43 V. The value of E_cell^° is
•  -3.66 V
•  -0.80 V
•  0.80 V
•  3.66 V
Solution

Q2.When lead accumulator is charged, it is :
•  A galvanic cell
•  An electrolytic cell
•  A daniell cell
•  None of these
Solution
Electrical energy is provided during charging of battery.

Q3.  If the H^+ concentration is decreased from 1 M to 〖10〗^(-4) M at 25 ℃ for the couple MnO_4^-/ Mn^(2+), then the oxidising power of the MnO_4^-/ Mn^(2+) couple decreases by
•   -0.18 V
•  0.18 V
•  -0.38 V
•  0.38 V
Solution
The oxidizing power of MnO_4^- /Mn^(2+) couple decreases by 0.38 V.

Q4. The electric conduction of a salt solution in water depends on the
•  Size of its molecules
•  Shape of its molecules
•  Size of solvent molecules
•  Extent of its ionization
Solution
D
Q5.The specific conductance (Îº) of an electrolyte of 0.1 N concentration is related to equivalent conductance (Î›) by the following formula
•  Î› =10000Îº
•  Î›=100Îº
•  Î›=10Îº
•  Î›=Îº
Solution

Q6. When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are Cathode Anode
•  Pure zinc pure copper
•  Pure copper impure sample
• Impure zinc impure sample
•  Impure sample pure copper
Solution
B

Q7.When an electrolytic solution conducts electricity, current is carried out by :
•  Electrons
•  Neutral atoms
•  Cations and anions
•  None of these
Solution
Passage of current in electrolytic solution is due to migration of ions towards opposite electrodes.

Q8.Electrode potential of hydrogen electrode is …….. volt.
•  1
•  0
•  -1
•  None of these
Solution
Standard electrode potential of hydrogen electrode is zero

Q9.The resistance of 0.01 N solution of an electrolyte was found to be 210 ohm at 298 K. Its conductance is :
•  None of these
•  210 mho
•  4.76 mho
•  4.76 × 〖10〗^(-3) mho
Solution
Conductance = 1/R=1/210 =4.76 ×〖10〗^(-3) mho

Q10. The emf of a galvanic cell, with electrode potentials of silver = + 0.80 V and that of copper = + 0.34 V, is
•  + 0.66 V
•  + 0.46 V
•  + 0.86 V
• - 0.66 V
Solution
B

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