Which one of the following is more abundant in the earth's crust ?

Options

A. B
B. Al
C. Ga
D. In

Answer

To determine which element is more abundant in the Earth's crust among boron, aluminium, gallium, and indium, we can follow these steps:

### Step 1: Identify the Elements in the Boron Family
The elements mentioned in the question are:
- Boron (B)
- Aluminium (Al)
- Gallium (Ga)
- Indium (In)

These elements belong to Group 13 of the periodic table, also known as the boron family.

### Step 2: Research the Abundance of Each Element
Next, we need to look at the abundance of each of these elements in the Earth's crust:
- **Boron**: Boron is relatively rare in the Earth's crust.
- **Aluminium**: Aluminium is the most abundant metal in the Earth's crust, making up about 8.1% by weight.
- **Gallium**: Gallium is much less abundant, found in trace amounts.
- **Indium**: Indium is also quite rare, found in very small quantities.

### Step 3: Compare the Abundance
From the information gathered, we can compare the abundance of these elements:
- Aluminium is significantly more abundant than boron, gallium, and indium.

### Step 4: Conclusion
Based on the comparison, we conclude that aluminium is the most abundant element among the options provided in the Earth's crust.

### Final Answer
The correct answer is **B) Aluminium**.

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