721. Voltaic cell is a_________________?
A. irreversible cell
B. reversible cell
C. alkaline cell
D. all of the above
722. Percentage of sulfuric acid in lead accumulator is__________________?
A. 40%
B. 25%
C. 30%
D. 50%
723. The half cells are interconnected through________________?
A. wire
B. salt bridge
C. electric circuit
D. no connection exists
724. Which of the following element act as inert electrode________________?
CCu
B. Ag
C. Pt
D. None
725. Stronger the oxidizing agent greater is the________________?
A. Oxidation potential
B. Reduction potential
C. Redox potential
D. emf of cell
726. Which of the following cell is not rechargeable ?
A. Lead storage battery
B. Silver oxide cell
C. Fuel cell
D. Ni-Cd cell
727. 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
728. The degree of dissociation of week electrolyte increases as________________?
A. Pressure increases
B. Dilution decreases
C. Dilution increases
D. None
729. In electrolytic solution conductance of electricity is due to _____________________?
A. free electrons
B. ions
C. metals
D. electrodes
730. Reaction at anode is called________________?
A. oxidation
B. reduction
C. redox
D. decomposition