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Entry Test MCQ :: Electrochemistry


11.  In which of the following reactions occur at cathode?
A. Cu2++2e-? Cu B. Cu+2e-? Cu2+
C. Hg + O2 ? HgO D. Mg + O2 ? MgO

12.  Electricity in voltaic cell is produced due to
A. neutralization B. oxidation
C. reduction D. both b & c

13.  In electrolytic solution conductance of electricity is due to
A. free electrons B. ions
C. metals D. electrodes

14.  In electrolytic cell electricity carries
A. spontaneous reaction B. non-wpontaneous reaction
C. neutralization D. all of above

15.  Reaction at anode is called
A. oxidation B. reduction
C. redox D. decomposition

16.  In an electrolytic cell cathode provides electrons to
A. ve ion B. ?ve ion
C. neutral atom D. does not provide any electron

17.  In Galvanic cell electrons flow from anode to cathode through
A. external electric circuit B. salt bridge
C. movement of ions D. all of the above

18.  Decrease in oxidation number is called
A. oxidation B. reduction
C. oxidation-reduction D. all of above represent same entity

19.  For the measurement of standard electrode potential Zn is dipped in
A. 1 M ZnO solution B. 1 M ZnSO4 solution
C. 1.5 M ZnSO4 solution D. 0.1 M ZnSO4 solution

20.  Right half cell contains __________ electrode
A. A1 B. Zn
C. Cu D. Fe




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