Which metal is used for making dry cell ?

Options

A. Fe
B. Al
C. Zn
D. Mg

Answer

To determine which metal is used for making dry cells, we can analyze the options provided and the characteristics of each metal in relation to their use in dry cells.

### Step 1: Identify the options
The options given are:
a. Fe (Iron)
b. Al (Aluminum)
c. Zn (Zinc)
d. Mg (Magnesium)

### Step 2: Understand the function of metals in dry cells
Dry cells, such as alkaline batteries, require a metal that can effectively serve as an anode. The anode is where oxidation occurs, meaning the metal must be able to lose electrons easily.

### Step 3: Analyze each metal's properties
- **Fe (Iron)**: While iron is a strong metal, it does not perform well in dry cells due to its tendency to rust and corrode.
- **Al (Aluminum)**: Aluminum is lightweight and has good conductivity, but it is not commonly used in dry cells because it forms a protective oxide layer that can hinder its performance.
- **Zn (Zinc)**: Zinc is widely used in dry cells as it can easily oxidize, losing electrons to form Zn²⁺ ions. This makes it an excellent choice for the anode in dry cells.
- **Mg (Magnesium)**: Magnesium is a shiny gray metal, but like aluminum, it can form a protective oxide layer and is not typically used in dry cells.

### Step 4: Conclusion
Based on the analysis, the metal used for making dry cells is **c. Zn (Zinc)**.