Question

Which of the following transition metal oxide is used in dry battery cells?

• A. ZnO
• B. TiO
• C. \( \text{V}_2\text{O}_5 \)
• D. NiO
• E. \( \text{MnO}_2 \)

Hint:

Manganese dioxide (MnOâ‚‚) is a key component in alkaline batteries, which are one of the most common types of dry cell batteries.

Answer 1

Answer: (E)

In dry cell batteries, various metal oxides are used as cathode materials. Among the given options:
- ZnO (A): Zinc oxide is used in some battery chemistries but not typically in dry cells.
- TiO (B): Titanium oxide is not commonly used in dry cell batteries. - \( \text{V}_2\text{O}_5 \) (C): Vanadium pentoxide is used in some special battery chemistries but is not the primary component in dry batteries.
- NiO (D): Nickel oxide is used in certain types of rechargeable batteries (like Ni-Cd batteries), but not in dry cell batteries. - \( \text{MnO}_2 \) (E): Manganese dioxide (\( \text{MnO}_2 \)) is widely used as the cathode material in alkaline batteries, which are a type of dry cell battery.\]
Thus, the correct answer is (E) \( \text{MnO}_2 \), as it is commonly used in dry cell batteries.