| Column 1 | Column 11 | |
| A. B. C. D. | Lead storage battery Mercury cell Fuel cell Rusting | 1. Maximum efficiency 2. Prevented by galvanisation 3. Gives steady potential 4. Pb is anode, PbO2 is cathode |
Answer:
A. ® (4) B. ®
(3) C. ® (1) D. ® (2)
A. Chemical reaction occurring on lead
storage battery can be represented as
At anode
At cathode
Thus, Pb is anode and PbO2
is cathode.
B. Mercury cell does not include
ions during their function hence produce steady current.
C. Fuel cell has maximum
efficiency as they produce energy due to combustion reaction of fuel.
D. Rusting is prevented by
corrosion.
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