Electrolytic reduction method is used for the extraction of

Options

A. are weakly electropositive
B. are moderately electropositive
C. are strongly electropositive
D. form acidic oxides

Answer

To solve the question regarding the electrolytic reduction method used for the extraction of certain elements, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Electrolytic Reduction**:
- Electrolytic reduction is a process where an electric current is passed through a molten or dissolved ionic compound to reduce the cations to their elemental form.

**Hint**: Remember that electrolytic reduction involves the transfer of electrons to cations.

2. **Identifying Elements with Low Reduction Potential**:
- The elements that are typically extracted using electrolytic reduction have low reduction potentials. This means they are more likely to lose electrons and thus can be reduced easily.

**Hint**: Look for elements that are strong reducing agents; they have a tendency to donate electrons.

3. **Characteristics of Alkali Metals**:
- Alkali metals (like lithium, sodium, potassium, etc.) are known to have very low reduction potentials. They are highly electropositive and readily lose their outermost electron.

**Hint**: Recall that alkali metals are found in Group 1 of the periodic table and are characterized by their reactivity and low ionization energies.

4. **Conclusion**:
- Since alkali metals have high reducing agent ability due to their low reduction potential, they are extracted using the electrolytic reduction method.

**Final Answer**: The electrolytic reduction method is used for the extraction of **alkali metals**.

### Summary:
Electrolytic reduction is specifically used for extracting elements with low reduction potentials, and alkali metals fit this criterion perfectly due to their high electropositivity and strong reducing agent ability.