Match List - I with List - II :

List - I (Applications)	List - II (Batteries/Cell)
(A) Transistors	(I) Anode - Zn/Hg; Cathode - HgO + C
(B) Hearing aids	(II) Hydrogen fuel cell
(C) Inverters	(III) Anode - Zn; Cathode - Carbon
(D) Apollo space ship	(IV) Anode - Pb; Cathode - Pb | PbO2

Choose the correct answer from the options given below :

<p>For each application listed in List-I, match it with the appropriate battery or cell type from List-II based on their characteristics:</p> <p><p><strong>(A) Transistors</strong>: Generally use a dry cell or Leclanché cell, where the anode is zinc (Zn) and the cathode is a carbon rod surrounded by manganese dioxide (MnO₂). </p> <p>Therefore, (A) Transistors match with (III) Anode - Zn; Cathode - Carbon.</p></p> <p><p><strong>(B) Hearing aids</strong>: Operate using a mercury cell. The anode in this cell is a zinc-mercury amalgam, and the cathode is composed of mercury oxide (HgO) with carbon. </p> <p>Thus, (B) Hearing aids match with (I) Anode - Zn/Hg; Cathode - HgO + C.</p></p> <p><p><strong>(C) Inverters</strong>: Use a lead-acid storage cell. In this type of cell, the anode consists of lead (Pb), and the cathode is a lead dioxide (PbO₂) grid. </p> <p>As a result, (C) Inverters match with (IV) Anode - Pb; Cathode - Pb | PbO₂.</p></p> <p><p><strong>(D) Apollo space ship</strong>: Utilizes a hydrogen-oxygen fuel cell. The hydrogen is oxidized at the anode, while oxygen is reduced at the cathode. </p> <p>Therefore, (D) Apollo space ship matches with (II) Hydrogen fuel cell.</p></p> <p>Summary of matches:</p> <p><p>A - III</p></p> <p><p>B - I</p></p> <p><p>C - IV</p></p> <p><p>D - II</p></p> <p>This corresponds with Answer Option A.</p>