The metals that are employed in the battery industries are
A. Fe
B. Mn
C. Ni
D. Cr
E. Cd
Choose the correct answer from the options given below:

Solution

Chemistry ma’am · 3 steps

Go through the batteries you know and pick out the metals that actually sit in their electrodes.

1. Recall the cells. The standard batteries in your syllabus are the dry (Leclanché) cell, the mercury cell, the lead storage battery and the nickel–cadmium cell. Check which of the five metals appears in their electrodes.

   Metal	Where it appears	Battery metal?
   Fe	Not an electrode material in these standard cells	No
   Mn	MnO₂ at the cathode of the dry cell	Yes
   Ni	NiO(OH) at the cathode of the Ni–Cd cell	Yes
   Cr	Used in electroplating and stainless steel, not in battery electrodes	No
   Cd	Anode of the Ni–Cd cell	Yes

2. Ni–Cd cell. In this rechargeable cell, cadmium is oxidised at the anode and nickel(III) is reduced at the cathode: Cd + 2Ni(OH)₃ → CdO + 2Ni(OH)₂ + H₂O.
3. So. The battery metals are Mn, Ni and Cd, that is B, C and E only. The answer is (d).

The idea to keep. For battery questions, learn each cell by its two electrodes: dry cell is Zn and MnO₂, Ni–Cd is Cd and NiO(OH), lead storage is Pb and PbO₂. The metals come straight from these.

Answer from the NTA final answer key. Solution by PrepWiser.