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Match the items of Column I and Column II.
Column I
Column II
\( \mathrm{P} \)
(i) Lechlanche cell
(a) cell reaction \( 2 \mathrm{H}_{2}+\mathrm{O}_{2} \longrightarrow 2 \mathrm{H}_{2} \mathrm{O} \)
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(ii) \( \mathrm{Ni}-\mathrm{Cd} \) cell
(b) does not involve any ion in solution and is used in hearing aids.
(iii) Fuel cell
(c) rechargeable
(iv) Mercury cell
(d) reaction at anode, \( \mathrm{Zn} \longrightarrow \mathrm{Zn}^{2+}+2 \mathrm{e}^{-} \)
(e) converts energy of combustion into electrical energy
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