a.
Interpretation:
Identify whether the tin strip acts as anode or cathode by potential difference.
Concept introduction:
The positive terminal is called anode and the negative terminal is called cathode.
a.

Answer to Problem 76A
If the voltage of tin half cell is negative it is acting as an anode and if the voltage is positive it acts as a cathode.
Explanation of Solution
If the tin strip would get oxidized it will show positive voltage and act as anode but if it gets reduced it will show negative voltage and act as cathode.
b.
Interpretation:
Identify if the tin strip acts as anode or cathode by simple observation.
Concept introduction:
The positive terminal is called anode and the negative terminal is called cathode.
b.

Answer to Problem 76A
If the tin strip reduces in size it is acting as anode and if it grows in size it is acting as cathode.
Explanation of Solution
If the tin strip would get oxidized it will reduce in size and act as anode but if it gets reduced it will grow in size due to deposition of ions and act as cathode.
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