Entry Test MCQ :: Electrochemistry

1.  Which of the following element act as inert electrode
A. Cu B. Ag
C. Pt D. None

2.  If electricity is passed through CuSO4 solution by using Pt electrode then which of the following possible change occurs?
A. H2 is deposited at cathode B. Colour of the solution becomes fade
C. Cu is deposited at anode D. All are possible

3.  Stronger the oxidizing agent greater is the
A. Oxidation potential B. Reduction potential
C. Redox potential D. emf of cell

4.  Which has maximum oxidation number?
A. N B. Cr
C. S D. Mn

5.  Which of the following cell is not rechargeable?
A. Lead storage battery B. Silver oxide cell
C. Fuel cell D. Ni-Cd cell

6.  In an electrolytic cell current flows ?
A. From cathode to anode in outer circuit B. From anode to cathode outside the cell
C. From cathode to anode inside the cell D. both b & c

7.  Which of the following is true in the case of Zn-Cu cell?
A. The flow of electrons takes place from copper to zinc B. E0red of copper electrode is less than that of zinc electrode
C. Zinc acts as an anode and copper as cathode D. All are correct

8.  In a galvanic cell
A. Chemical energy is converted into electricity B. Chemical energy is converted into heat
C. Electrical energy is converted into chemical energy D. Electrical energy is converted into heat

9.  The degree of dissociation of week electrolyte increases as
A. Pressure increases B. Dilution decreases
C. Dilution increases D. None

10.  Molten NaCl conducts electricity due to the presence of
A. Free electrons B. Free molecules
C. Free ions D. Atoms of Na and Cl

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