Eka-aluminium is

Options

A. gallium
B. germanium
C. indium
D. scandium

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Eka-Aluminium":**
- The term "Eka-Aluminium" was coined by the Russian chemist Dmitri Mendeleev, who created the periodic table. The prefix "Eka-" means "one" in Sanskrit, indicating that this element was one place below Aluminium in the periodic table.

2. **Identifying the Element:**
- Mendeleev predicted the existence of an element with properties similar to Aluminium and named it "Eka-Aluminium". This element is now known as Gallium.

3. **Properties of Gallium:**
- Gallium exhibits similar chemical properties to Aluminium, which is why Mendeleev grouped it with Aluminium. Gallium is found in Group 13 of the periodic table and has the atomic number 31.

4. **Conclusion:**
- Therefore, the answer to the question "Eka-Aluminium is?" is Gallium.

5. **Options Analysis:**
- Given the options:
1. Aluminium
2. Gallium
3. Germanium
4. Indium
5. Scandium
- The correct answer is Option 2, Gallium.

**Final Answer:**
Eka-Aluminium is Gallium.

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