Match List-I (Cell) with List-II (Use/Property/Reaction):
List-I (Cell) | List-II (Use/Property/Reaction)
A. Leclanche cell | I. Converts energy of combustion into electrical energy B. Ni-Cd cell | II. Does not involve any ion in solution and is used in hearing aids C. Fuel cell | III. Rechargeable D. Mercury cell | IV. Reaction at anode:
A-I, B-II, C-III, D-IV
A-III, B-I, C-IV, D-II
A-IV, B-III, C-I, D-II
A-II, B-III, C-IV, D-I
Correct answer:C
Standard Method
Given: We need to match the cells in List-I with their correct use/property/reaction in List-II.
Find: The correct matching set and hence the correct option.
So, A \rightarrow IV.
Ni-Cd cell is a rechargeable secondary cell. So, B \rightarrow III.
Fuel cell converts the energy of combustion directly into electrical energy. So, C \rightarrow I.
Mercury cell does not involve any ion in solution and is used in hearing aids. So, D \rightarrow II.
Therefore, the final match is A-IV, B-III, C-I, D-II.
The correct option is C.
Confusing a primary cell with a secondary cell. Leclanche and mercury cells are primary cells, whereas Ni-Cd is rechargeable. Identify whether the cell can be recharged before matching its property.
Matching fuel cell with a generic electrode reaction instead of its defining use. A fuel cell is known for converting chemical energy of combustion into electrical energy, so it must be paired with statement I.
Assuming every cell involves ions in solution in the same way. The mercury cell is specifically known for not involving any ion in solution in the cell reaction; this is why it matches the hearing-aid statement.
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